[Bug]: Badge not working in iOS with "Increase by" option

[devsideal]

What happened?

Badge not working in iOS with "Increase by" option, alwasy showing only 1 count.

https://github.com/OneSignal/OneSignal-Flutter-SDK/assets/91250232/432e9410-bee2-447d-a193-aff73214150b

Steps to reproduce?

1. Added package successfully
2. Followed all the steps given here https://documentation.onesignal.com/docs/badges
3. Send push from OneSignal console by setting 1 in "Increase by" option
4. In iPhone alwasy showing count 1 (for reference please see the video)

What did you expect to happen?

If we send push with Increase by 1, It should add in previous count.

OneSignal Flutter SDK version

onesignal_flutter: ^3.5.1

Which platform(s) are affected?

• [X] iOS
• [ ] Android

Relevant log output

No response

Code of Conduct

• [X] I agree to follow this project's Code of Conduct

[jennantilla]

@devsideal thanks for reaching out and providing reproduction steps! We're looking into this and will get back to you as soon as possible.

[jkasten2]

@devsideal This feature requires the Notification Service Extension. Can you double check you have it setup correctly based on the documentation? https://documentation.onesignal.com/docs/flutter-sdk-setup#add-notification-service-extension

[devsideal]

@jkasten2 Yes I have created the OneSignalNotificationServiceExtension and Added App Group capability in both "Main App Target" and "OneSignalNotificationServiceExtension Target" as mintioned on the documentatoin.

[yuyangpl]

Make sure the "Set to" option is OK。but "Increase by" error onesignal_flutter: 5.2.1 Flutter 3.22.2

[devsideal]

@yuyangpl Yes, "Set to" option is OK But "Increase by" is not working as expected. and currenlly using onesignal_flutter: ^3.5.1 and Flutter 3.19.5, I will try with updated versions.