add-flag-for-close-confirmation.patch broken on 126

OS/Platform

Windows
Installed

https://ungoogled-software.github.io/ungoogled-chromium-binaries/
Version

126.0.6478.55
Have you tested that this is not an upstream issue or an issue with your configuration?

[ ] I have tried reproducing this issue in Chrome and it could not be reproduced there
[ ] I have tried reproducing this issue in vanilla Chromium and it could not be reproduced there
[X] I have tried reproducing this issue in ungoogled-chromium with a new and empty profile using --user-data-dir command line argument and it could not be reproduced there
Description

The Close Confirmation flag added in "add-flag-for-close-confirmation.patch" is broken on chrome v126.
How to Reproduce?

do a fresh install of ungoogled-chromium (I used https://ungoogled-software.github.io/ungoogled-chromium-binaries/releases/windows/64bit/126.0.6478.55-1 and extracted it into an empty VM)
go to chrome://flags and set the "Close Confirmation" flag to "show confirmation with multiple windows"
click the "relaunch" prompt that shows up
after the browser relaunches, use the app menu (3 dots) -> new window
close the newly opened window
click either the "close" button or the "cancel" button
Actual behaviour

The browser crashes and all windows closes, regardless of which option I choose.
Expected behaviour

Only the window I want closed closes, or nothing happens if I click the "cancel" button.
Relevant log output

[1744:148:0617/141300.903:WARNING:chrome_main_delegate.cc(742)] This is Chrome version 126.0.6478.55 (not a warning)
[1744:148:0617/141300.903:VERBOSE1:variations_field_trial_creator_base.cc(77)] VariationsSeedUsage:12
[1744:148:0617/141300.903:VERBOSE1:variations_field_trial_creator_base.cc(350)] VariationsSetupComplete
[1744:148:0617/141300.919:VERBOSE1:webrtc_event_log_manager.cc(97)] WebRTC remote-bound event logging enabled.
[1744:148:0617/141300.919:VERBOSE1:pref_proxy_config_tracker_impl.cc(191)] 0000700000044580: set chrome proxy config service to 0000700000118340
[1744:148:0617/141300.934:VERBOSE1:device_event_log_impl.cc(198)] [14:13:00.923] Display: EVENT: screen_win.cc:836 Displays updated, count: 1
[1744:148:0617/141300.934:VERBOSE1:device_event_log_impl.cc(198)] [14:13:00.927] Display: EVENT: screen_win.cc:838 Display[4957497] bounds=[0,0 2358x1298], workarea=[0,0 2358x1258], scale=1, rotation=0, panel_rotation=0 external detected
[1744:7048:0617/141300.934:VERBOSE1:media_stream_manager.cc(1527)] MSM::InitializeMaybeAsync([this=00007000000BAC00])
[1744:7048:0617/141300.934:VERBOSE1:media_stream_manager.cc(1527)] MDM::MediaDevicesManager()
[1744:7048:0617/141300.934:VERBOSE1:media_stream_manager.cc(1527)] MSM::MediaStreamManager([this=00007000000BAC00]))
[1744:1752:0617/141300.934:WARNING:dns_config_service_win.cc(605)] Failed to read DnsConfig.
[1744:148:0617/141300.934:VERBOSE1:chrome_browser_cloud_management_controller.cc(161)] Cloud management controller initialization aborted as CBCM is not enabled. Please use the `--enable-chrome-browser-cloud-management` command line flag to enable it if you are not using the official Google Chrome build.
[1744:148:0617/141300.934:VERBOSE1:install_util.cc(218)] No existing Chrome install found.
[1744:148:0617/141300.950:VERBOSE1:account_consistency_mode_manager.cc(206)] Desktop Identity Consistency disabled as sign-in to Chrome is not allowed
[1744:148:0617/141300.950:VERBOSE1:device_event_log_impl.cc(198)] [14:13:00.940] Bluetooth: EVENT: bluetooth_api.cc:82 BluetoothAPI: 000070000061DA00
[1744:148:0617/141300.950:VERBOSE1:pref_proxy_config_tracker_impl.cc(191)] 00007000000479C0: set chrome proxy config service to 000070000011AF20
[1744:148:0617/141300.950:VERBOSE1:account_consistency_mode_manager.cc(206)] Desktop Identity Consistency disabled as sign-in to Chrome is not allowed
[1744:148:0617/141300.950:VERBOSE1:mutable_profile_oauth2_token_service_delegate.cc(223)] MutablePO2TS::MutablePO2TS
[1744:148:0617/141300.950:VERBOSE1:account_consistency_mode_manager.cc(206)] Desktop Identity Consistency disabled as sign-in to Chrome is not allowed
[1744:148:0617/141300.950:VERBOSE1:gaia_auth_util.cc(51)] Canonicalized @9ma1l.qjz9zk to @9ma1l.qjz9zk
[1744:148:0617/141300.950:VERBOSE1:gaia_auth_util.cc(51)] Canonicalized @9ma1l.qjz9zk to @9ma1l.qjz9zk
[1744:148:0617/141300.950:VERBOSE1:bluetooth_low_energy_event_router.cc(279)] Initializing BluetoothLowEnergyEventRouter.
[1744:148:0617/141300.950:VERBOSE1:account_consistency_mode_manager.cc(206)] Desktop Identity Consistency disabled as sign-in to Chrome is not allowed
[1744:148:0617/141300.950:VERBOSE1:account_reconcilor.cc(171)] AccountReconcilor::AccountReconcilor
[1744:148:0617/141300.950:VERBOSE1:account_reconcilor.cc(205)] AccountReconcilor::Initialize
[1744:148:0617/141300.950:VERBOSE1:account_consistency_mode_manager.cc(206)] Desktop Identity Consistency disabled as sign-in to Chrome is not allowed
[1744:148:0617/141300.950:VERBOSE1:account_consistency_mode_manager.cc(206)] Desktop Identity Consistency disabled as sign-in to Chrome is not allowed
[1744:1368:0617/141300.950:VERBOSE1:token_service_table.cc(148)] Loaded tokens: result = 3 ; number of tokens loaded = 0
[1744:148:0617/141300.950:VERBOSE1:gaia_auth_util.cc(51)] Canonicalized @9ma1l.qjz9zk to @9ma1l.qjz9zk
[1744:148:0617/141300.950:VERBOSE1:gaia_auth_util.cc(51)] Canonicalized @9ma1l.qjz9zk to @9ma1l.qjz9zk
[1744:148:0617/141300.965:VERBOSE1:extension_service.cc(1473)] AddComponentExtension Chromium PDF Viewer
[1744:148:0617/141300.965:WARNING:browser_management_service.cc(128)] EnterpriseLogoUrl fetch failed with error code -1 and MIME type 
[1744:148:0617/141300.965:VERBOSE1:mutable_profile_oauth2_token_service_delegate.cc(310)] MutablePO2TS::RefreshTokenIsAvailable
[1744:148:0617/141300.965:VERBOSE1:profile_manager.cc(1982)] ForceSigninCheck: 0, 0, 1
[1744:2852:0617/141300.965:VERBOSE1:component_installer.cc(455)] StartRegistration for Widevine Content Decryption Module
[1744:5456:0617/141300.965:VERBOSE1:component_installer.cc(455)] StartRegistration for Subresource Filter Rules
[1744:148:0617/141300.965:VERBOSE1:on_device_head_suggest_component_installer.cc(61)] On Device Head Component will fetch model for locale: ENUS500000
[1744:1752:0617/141300.965:VERBOSE1:component_installer.cc(455)] StartRegistration for OnDeviceHeadSuggest
[1744:148:0617/141300.965:VERBOSE1:trust_token_key_commitments_component_installer.cc(30)] Registering Trust Token Key Commitments component.
[1744:1368:0617/141300.965:VERBOSE1:component_installer.cc(455)] StartRegistration for Optimization Hints
[1744:148:0617/141300.965:VERBOSE1:first_party_sets_component_installer.cc(39)] Registering Related Website Sets component.
[1744:2628:0617/141300.965:VERBOSE1:component_installer.cc(455)] StartRegistration for Trust Token Key Commitments
[1744:148:0617/141300.965:VERBOSE1:privacy_sandbox_attestations_component_installer.cc(207)] Registering Privacy Sandbox Attestations component
[1744:2620:0617/141300.965:VERBOSE1:component_installer.cc(455)] StartRegistration for Privacy Sandbox Attestations
[1744:148:0617/141300.965:VERBOSE1:file_type_policies_component_installer.cc(114)] Registering File Type Policies component.
[1744:6704:0617/141300.965:VERBOSE1:component_installer.cc(455)] StartRegistration for Certificate Error Assistant
[1744:5456:0617/141300.965:VERBOSE1:component_installer.cc(455)] StartRegistration for File Type Policies
[1744:6352:0617/141300.965:VERBOSE1:component_installer.cc(455)] StartRegistration for CRLSet
[1744:1368:0617/141300.965:VERBOSE1:component_installer.cc(455)] StartRegistration for Origin Trials
[1744:1752:0617/141300.965:VERBOSE1:component_installer.cc(455)] StartRegistration for MEI Preload
[1744:2852:0617/141300.965:VERBOSE1:component_installer.cc(455)] StartRegistration for PKI Metadata
[1744:148:0617/141300.965:VERBOSE1:hyphenation_component_installer.cc(152)] Registering Hyphenation component.
[1744:6376:0617/141300.965:VERBOSE1:component_installer.cc(455)] StartRegistration for Crowd Deny
[1744:2628:0617/141300.965:VERBOSE1:component_installer.cc(455)] StartRegistration for Safety Tips
[1744:2620:0617/141300.965:VERBOSE1:component_installer.cc(455)] StartRegistration for Hyphenation
[1744:6364:0617/141300.965:VERBOSE1:component_installer.cc(455)] StartRegistration for Zxcvbn Data Dictionaries
[1744:148:0617/141300.965:VERBOSE1:tpcd_metadata_component_installer.cc(23)] Third Party Cookie Deprecation Metadata component.
[1744:6384:0617/141300.965:VERBOSE1:component_installer.cc(455)] StartRegistration for Autofill States Data
[1744:6704:0617/141300.965:VERBOSE1:component_installer.cc(455)] StartRegistration for Third-Party Cookie Deprecation Metadata
[1744:148:0617/141300.965:VERBOSE1:profile_manager.cc(1324)] AddKeepAlive(Default, kBrowserWindow). keep_alives=[kWaitingForFirstBrowserWindow (1), kBrowserWindow (1)]
[1744:148:0617/141300.965:VERBOSE1:profile_manager.cc(1397)] ClearFirstBrowserWindowKeepAlive(Default). keep_alives=[kBrowserWindow (1)]
[1744:5456:0617/141300.965:VERBOSE1:command_storage_backend.cc(602)] CommandStorageBackend::ReadLastSessionCommands, reading commands from: C:\Users\Administrator\AppData\Local\Chromium\User Data\Default
[1744:6064:0617/141300.965:VERBOSE1:command_storage_backend.cc(602)] CommandStorageBackend::ReadLastSessionCommands, reading commands from: C:\Users\Administrator\AppData\Local\Chromium\User Data\Default\Sessions\Session_13363121483596350
[1744:148:0617/141300.965:VERBOSE1:mutable_profile_oauth2_token_service_delegate.cc(407)] MutablePO2TS::OnWebDataServiceRequestDone. Result type: 6
[1744:148:0617/141300.965:VERBOSE1:mutable_profile_oauth2_token_service_delegate.cc(464)] MutablePO2TS::LoadAllCredentialsIntoMemory; 0 redential(s).
[1744:148:0617/141300.965:VERBOSE1:mutable_profile_oauth2_token_service_delegate.cc(310)] MutablePO2TS::RefreshTokenIsAvailable
[1744:148:0617/141300.965:VERBOSE1:mutable_profile_oauth2_token_service_delegate.cc(310)] MutablePO2TS::RefreshTokenIsAvailable
[1744:148:0617/141300.965:VERBOSE1:mutable_profile_oauth2_token_service_delegate.cc(310)] MutablePO2TS::RefreshTokenIsAvailable
[1744:148:0617/141300.965:VERBOSE1:mutable_profile_oauth2_token_service_delegate.cc(310)] MutablePO2TS::RefreshTokenIsAvailable
[1744:148:0617/141300.965:WARNING:external_registry_loader_win.cc(232)] Error observing HKLM: 5
[1744:148:0617/141300.965:VERBOSE1:component_installer.cc(534)] FinishRegistration for Subresource Filter Rules
[1744:148:0617/141300.965:VERBOSE1:component_updater_service.cc(163)] CrxUpdateService starting up. First update attempt will take place in 60 s seconds. Next update attempt will take place in 18000 s seconds. 
[1744:148:0617/141300.965:VERBOSE1:component_installer.cc(534)] FinishRegistration for Widevine Content Decryption Module
[1744:148:0617/141300.965:VERBOSE1:component_installer.cc(534)] FinishRegistration for OnDeviceHeadSuggest
[1744:148:0617/141300.965:VERBOSE1:component_installer.cc(534)] FinishRegistration for Optimization Hints
[1744:148:0617/141300.965:VERBOSE1:component_installer.cc(534)] FinishRegistration for Trust Token Key Commitments
[1744:148:0617/141300.965:VERBOSE1:component_installer.cc(534)] FinishRegistration for Privacy Sandbox Attestations
[1744:148:0617/141300.965:VERBOSE1:component_installer.cc(534)] FinishRegistration for Certificate Error Assistant
[1744:148:0617/141300.965:VERBOSE1:component_installer.cc(534)] FinishRegistration for File Type Policies
[1744:148:0617/141300.965:VERBOSE1:component_installer.cc(534)] FinishRegistration for Crowd Deny
[1744:148:0617/141300.965:VERBOSE1:component_installer.cc(534)] FinishRegistration for Origin Trials
[1744:148:0617/141300.965:VERBOSE1:component_installer.cc(534)] FinishRegistration for Safety Tips
[1744:148:0617/141300.965:VERBOSE1:component_installer.cc(534)] FinishRegistration for PKI Metadata
[1744:148:0617/141300.965:VERBOSE1:component_installer.cc(534)] FinishRegistration for Third-Party Cookie Deprecation Metadata
[1744:148:0617/141300.965:VERBOSE1:component_installer.cc(534)] FinishRegistration for CRLSet
[1744:148:0617/141300.965:VERBOSE1:component_installer.cc(534)] FinishRegistration for Autofill States Data
[1744:148:0617/141300.965:VERBOSE1:component_installer.cc(534)] FinishRegistration for Zxcvbn Data Dictionaries
[1744:148:0617/141300.965:VERBOSE1:component_installer.cc(534)] FinishRegistration for MEI Preload
[1744:148:0617/141300.965:VERBOSE1:component_installer.cc(534)] FinishRegistration for Hyphenation
[1336:6348:0617/141300.965:WARNING:dns_config_service_win.cc(605)] Failed to read DnsConfig.
[1744:148:0617/141300.981:VERBOSE1:profile_manager.cc(1324)] AddKeepAlive(Default, kBrowserWindow). keep_alives=[kBrowserWindow (2)]
[1744:5456:0617/141300.981:VERBOSE1:command_storage_backend.cc(602)] CommandStorageBackend::ReadLastSessionCommands, reading commands from: C:\Users\Administrator\AppData\Local\Chromium\User Data\Default\Sessions\Tabs_13363121483731903
[1336:6436:0617/141300.981:VERBOSE1:configured_proxy_resolution_service.cc(1162)] Failed configuring with PAC script, falling-back to manual proxy servers.
[1336:6436:0617/141300.981:VERBOSE1:configured_proxy_resolution_service.cc(1162)] Failed configuring with PAC script, falling-back to manual proxy servers.
[1744:148:0617/141301.012:VERBOSE1:mutable_profile_oauth2_token_service_delegate.cc(310)] MutablePO2TS::RefreshTokenIsAvailable
[1744:148:0617/141301.012:VERBOSE1:account_consistency_mode_manager.cc(206)] Desktop Identity Consistency disabled as sign-in to Chrome is not allowed
[1744:148:0617/141301.028:VERBOSE1:device_event_log_impl.cc(198)] [14:13:01.014] Display: EVENT: screen_win.cc:836 Displays updated, count: 1
[1744:148:0617/141301.028:VERBOSE1:device_event_log_impl.cc(198)] [14:13:01.014] Display: EVENT: screen_win.cc:838 Display[4957497] bounds=[0,0 2358x1298], workarea=[0,0 2358x1258], scale=1, rotation=0, panel_rotation=0 external detected
[1744:148:0617/141301.043:VERBOSE1:profile_manager.cc(1324)] AddKeepAlive(Default, kBrowserWindow). keep_alives=[kBrowserWindow (3)]
[5436:5684:0617/141301.043:INFO:cpu_info.cc(53)] Available number of cores: 16
[5656:1828:0617/141301.043:INFO:cpu_info.cc(53)] Available number of cores: 16
[5436:5684:0617/141301.043:WARNING:runtime_features.cc(688)] AttributionReporting cannot be enabled in this configuration. Use --enable-features=ConversionMeasurement in addition.
[5436:5684:0617/141301.043:WARNING:runtime_features.cc(702)] AttributionReportingCrossAppWeb cannot be enabled in this configuration. Use --enable-features=ConversionMeasurement,AttributionReportingCrossAppWeb in addition.
[5656:1828:0617/141301.043:WARNING:runtime_features.cc(688)] AttributionReporting cannot be enabled in this configuration. Use --enable-features=ConversionMeasurement in addition.
[5656:1828:0617/141301.043:WARNING:runtime_features.cc(702)] AttributionReportingCrossAppWeb cannot be enabled in this configuration. Use --enable-features=ConversionMeasurement,AttributionReportingCrossAppWeb in addition.
[1744:148:0617/141301.059:VERBOSE1:mutable_profile_oauth2_token_service_delegate.cc(310)] MutablePO2TS::RefreshTokenIsAvailable
[1744:148:0617/141301.059:VERBOSE1:account_consistency_mode_manager.cc(206)] Desktop Identity Consistency disabled as sign-in to Chrome is not allowed
[1744:148:0617/141301.075:VERBOSE1:signal_filter_processor.cc(61)] Segmentation platform started observing Session.TotalDuration
[1744:148:0617/141301.075:VERBOSE1:signal_filter_processor.cc(61)] Segmentation platform started observing Commerce.PriceDrops.ActiveTabNavigationComplete.IsProductDetailPage
[1744:148:0617/141301.075:VERBOSE1:signal_filter_processor.cc(54)] Segmentation platform started observing Autofill_PolledCreditCardSuggestions
[1744:148:0617/141301.075:VERBOSE1:signal_filter_processor.cc(61)] Segmentation platform started observing Omnibox.SuggestionUsed.ClientSummarizedResultType
[1744:148:0617/141301.075:VERBOSE1:signal_filter_processor.cc(61)] Segmentation platform started observing Sync.DeviceCount2
[1744:148:0617/141301.075:VERBOSE1:signal_filter_processor.cc(61)] Segmentation platform started observing Sync.DeviceCount2.Phone
[1744:148:0617/141301.075:VERBOSE1:signal_filter_processor.cc(61)] Segmentation platform started observing Sync.DeviceCount2.Desktop
[1744:148:0617/141301.075:VERBOSE1:signal_filter_processor.cc(61)] Segmentation platform started observing Sync.DeviceCount2.Tablet
[1744:148:0617/141301.075:VERBOSE1:signal_filter_processor.cc(54)] Segmentation platform started observing MobileBookmarkManagerOpen
[1744:148:0617/141301.075:VERBOSE1:signal_filter_processor.cc(54)] Segmentation platform started observing NewTabPage.MostVisited.Clicked
[1744:148:0617/141301.075:VERBOSE1:signal_filter_processor.cc(54)] Segmentation platform started observing TabGroup.Created.OpenInNewTab
[1744:148:0617/141301.075:VERBOSE1:signal_filter_processor.cc(54)] Segmentation platform started observing Android.HistoryPage.OpenItem
[1744:148:0617/141301.075:VERBOSE1:signal_filter_processor.cc(54)] Segmentation platform started observing MobileMenuRecentTabs
[1744:148:0617/141301.075:VERBOSE1:signal_filter_processor.cc(61)] Segmentation platform started observing PasswordManager.ManagePasswordsReferrer
[1744:148:0617/141301.075:VERBOSE1:signal_filter_processor.cc(61)] Segmentation platform started observing PasswordManager.ProfileStore.TotalAccountsHiRes3.WithScheme.Https
[1744:148:0617/141301.075:VERBOSE1:signal_filter_processor.cc(61)] Segmentation platform started observing PasswordManager.FillingAssistance
[1744:148:0617/141301.075:VERBOSE1:signal_filter_processor.cc(61)] Segmentation platform started observing PasswordManager.NewlySavedPasswordIsGenerated
[1744:148:0617/141301.075:VERBOSE1:signal_filter_processor.cc(61)] Segmentation platform started observing PasswordManager.SaveUIDismissalReason
[1744:148:0617/141301.075:VERBOSE1:signal_filter_processor.cc(61)] Segmentation platform started observing PasswordManager.SaveUIDismissalReason
[1744:148:0617/141301.075:VERBOSE1:signal_filter_processor.cc(61)] Segmentation platform started observing IOS.CredentialExtension.IsEnabled.Startup
[3116:3120:0617/141301.130:INFO:cpu_info.cc(53)] Available number of cores: 16
[3116:3120:0617/141301.130:WARNING:runtime_features.cc(688)] AttributionReporting cannot be enabled in this configuration. Use --enable-features=ConversionMeasurement in addition.
[3116:3120:0617/141301.130:WARNING:runtime_features.cc(702)] AttributionReportingCrossAppWeb cannot be enabled in this configuration. Use --enable-features=ConversionMeasurement,AttributionReportingCrossAppWeb in addition.
[1744:148:0617/141301.137:VERBOSE1:profile_manager.cc(1376)] RemoveKeepAlive(Default, kBrowserWindow). keep_alives=[kBrowserWindow (2)]
[1744:148:0617/141301.137:VERBOSE1:device_event_log_impl.cc(198)] [14:13:01.131] Display: EVENT: screen_win.cc:836 Displays updated, count: 1
[1744:148:0617/141301.137:VERBOSE1:device_event_log_impl.cc(198)] [14:13:01.131] Display: EVENT: screen_win.cc:838 Display[4957497] bounds=[0,0 2358x1298], workarea=[0,0 2358x1258], scale=1, rotation=0, panel_rotation=0 external detected
[5656:1828:0617/141301.153:VERBOSE1:script_context.cc(149)] Created context:
  extension id:           (none)
  frame:                  00004C4F0014E238
  URL:                    
  context_type:           WEBUI
  effective extension id: (none)
  effective context type: WEBUI
[3116:3120:0617/141301.153:VERBOSE1:script_context.cc(149)] Created context:
  extension id:           (none)
  frame:                  000074710014E238
  URL:                    
  context_type:           WEBUI
  effective extension id: (none)
  effective context type: WEBUI
[5656:1828:0617/141301.153:VERBOSE1:script_context.cc(149)] Created context:
  extension id:           (none)
  frame:                  0000000000000000
  URL:                    
  context_type:           UNSPECIFIED
  effective extension id: (none)
  effective context type: UNSPECIFIED
[3116:3120:0617/141301.153:VERBOSE1:script_context.cc(149)] Created context:
  extension id:           (none)
  frame:                  0000000000000000
  URL:                    
  context_type:           UNSPECIFIED
  effective extension id: (none)
  effective context type: UNSPECIFIED
[3116:3120:0617/141301.155:VERBOSE1:dispatcher.cc(419)] Num tracked contexts: 1
[5656:1828:0617/141301.155:VERBOSE1:dispatcher.cc(419)] Num tracked contexts: 1
[1744:148:0617/141301.156:VERBOSE1:mutable_profile_oauth2_token_service_delegate.cc(310)] MutablePO2TS::RefreshTokenIsAvailable
[1744:148:0617/141301.158:VERBOSE1:mutable_profile_oauth2_token_service_delegate.cc(310)] MutablePO2TS::RefreshTokenIsAvailable
[1744:148:0617/141301.288:VERBOSE1:segment_result_provider.cc(136)] GetSegmentResult: segment=OPTIMIZATION_TARGET_SEGMENTATION_DEVICE_SWITCHER ignoring DB score, executing model.
[1744:148:0617/141301.288:VERBOSE1:segment_result_provider.cc(277)] ExecuteModelAndGetScore: segment=OPTIMIZATION_TARGET_SEGMENTATION_DEVICE_SWITCHER default segment info not available
[1744:148:0617/141301.288:VERBOSE1:segment_result_provider.cc(210)] OnGotModelScore: segment=OPTIMIZATION_TARGET_SEGMENTATION_DEVICE_SWITCHER failed to get database model score, trying default model.
[1744:148:0617/141302.794:VERBOSE1:mutable_profile_oauth2_token_service_delegate.cc(310)] MutablePO2TS::RefreshTokenIsAvailable
[1744:148:0617/141302.794:VERBOSE1:profile_manager.cc(1324)] AddKeepAlive(Default, kChromeViewsDelegate). keep_alives=[kBrowserWindow (2), kChromeViewsDelegate (1)]
[1744:4184:0617/141303.200:VERBOSE1:component_installer.cc(455)] StartRegistration for Related Website Sets
[1744:148:0617/141303.224:VERBOSE1:component_installer.cc(534)] FinishRegistration for Related Website Sets
[1744:148:0617/141303.224:VERBOSE1:first_party_sets_component_installer.cc(44)] Received Related Website Sets
[1744:148:0617/141303.226:VERBOSE1:profile_manager.cc(1324)] AddKeepAlive(Default, kExtensionUpdater). keep_alives=[kBrowserWindow (2), kChromeViewsDelegate (1), kExtensionUpdater (1)]
[1744:148:0617/141303.226:VERBOSE1:profile_manager.cc(1376)] RemoveKeepAlive(Default, kExtensionUpdater). keep_alives=[kBrowserWindow (2), kChromeViewsDelegate (1)]
[1744:148:0617/141303.229:VERBOSE1:device_event_log_impl.cc(198)] [14:13:03.216] USB: USER: usb_service_win.cc:762 USB device added: path=\\?\usb#vid_0e0f&pid_0003#6&30c5d09c&0&5#{a5dcbf10-6530-11d2-901f-00c04fb951ed} vendor=3599 "VMware", product=3 "VMware Virtual USB Mouse", serial="", driver="usbccgp", guid=fdf19afd-cfc5-40ff-92ea-d4ea230953a1
[1744:148:0617/141303.471:VERBOSE1:profile_manager.cc(1324)] AddKeepAlive(Default, kBrowserWindow). keep_alives=[kBrowserWindow (3), kChromeViewsDelegate (1)]
[1744:148:0617/141303.482:VERBOSE1:mutable_profile_oauth2_token_service_delegate.cc(310)] MutablePO2TS::RefreshTokenIsAvailable
[1744:148:0617/141303.482:VERBOSE1:account_consistency_mode_manager.cc(206)] Desktop Identity Consistency disabled as sign-in to Chrome is not allowed
[2576:3152:0617/141303.513:INFO:cpu_info.cc(53)] Available number of cores: 16
[2576:3152:0617/141303.528:WARNING:runtime_features.cc(688)] AttributionReporting cannot be enabled in this configuration. Use --enable-features=ConversionMeasurement in addition.
[2576:3152:0617/141303.528:WARNING:runtime_features.cc(702)] AttributionReportingCrossAppWeb cannot be enabled in this configuration. Use --enable-features=ConversionMeasurement,AttributionReportingCrossAppWeb in addition.
[1744:148:0617/141303.528:VERBOSE1:profile_manager.cc(1376)] RemoveKeepAlive(Default, kChromeViewsDelegate). keep_alives=[kBrowserWindow (3)]
[5436:5684:0617/141303.528:VERBOSE1:script_context.cc(149)] Created context:
  extension id:           (none)
  frame:                  00003E5B0014E238
  URL:                    
  context_type:           WEBUI
  effective extension id: (none)
  effective context type: WEBUI
[5436:5684:0617/141303.528:VERBOSE1:script_context.cc(149)] Created context:
  extension id:           (none)
  frame:                  0000000000000000
  URL:                    
  context_type:           UNSPECIFIED
  effective extension id: (none)
  effective context type: UNSPECIFIED
[5436:5684:0617/141303.528:VERBOSE1:dispatcher.cc(419)] Num tracked contexts: 1
[1744:148:0617/141303.543:VERBOSE1:mutable_profile_oauth2_token_service_delegate.cc(310)] MutablePO2TS::RefreshTokenIsAvailable
Additional context

This seems to be tied to the prompt itself. If I choose the "show confirmation with last window" option, windows close fine until the last one (when the prompt shows up).
ungoogled-software / ungoogled-chromium

add-flag-for-close-confirmation.patch broken on 126 #2917
