FlatList with sticky ListHeaderComponent, stickyHeaderIndices, onViewableItemsChanged gives incorrect viewableItems #31109

[tycobbb]

Description

exactly this issue: https://github.com/facebook/react-native/issues/31109. this is still a problem.

---

using FlatList with stickyHeaderIndices, viewabilityConfigCallbackPairs, and ListHeaderComponent, when scrolling the list onViewableItemsChanged is called. the viewableItems includes items that are behind (not viewable) the sticky list header.

const viewabilityConfig = {
  minimumViewTime: 1000,
  waitForInteraction: true,
  itemVisiblePercentThreshold: 100,
}

const onViewableItemsChanged = React.useCallback(
  ({ viewableItems, changed }) => {
    console.log('viewableItems', viewableItems)
    console.log('changed', changed)
  },
  []
)

const viewabilityConfigCallbackPairs = React.useRef([
  { viewabilityConfig, onViewableItemsChanged },
])

<FlatList
  stickyHeaderIndices={[0]}
  viewabilityConfigCallbackPairs={viewabilityConfigCallbackPairs.current}
  ListHeaderComponent={() => <MyListHeader/>}
/>

React Native Version

0.71.7

Output of npx react-native info

System: OS: macOS 12.6 CPU: (10) arm64 Apple M1 Pro Memory: 509.05 MB / 32.00 GB Shell: 5.8.1 - /bin/zsh Binaries: Node: 16.18.1 - ~/.asdf/installs/nodejs/16.18.1/bin/node Yarn: 1.22.19 - ~/.asdf/installs/nodejs/16.18.1/bin/yarn npm: 8.19.2 - ~/.asdf/plugins/nodejs/shims/npm Watchman: Not Found Managers: CocoaPods: 1.11.3 - /Users/ty/.asdf/shims/pod SDKs: iOS SDK: Platforms: DriverKit 21.4, iOS 16.0, macOS 12.3, tvOS 16.0, watchOS 9.0 Android SDK: Not Found IDEs: Android Studio: 2021.3 AI-213.7172.25.2113.9123335 Xcode: 14.0.1/14A400 - /usr/bin/xcodebuild Languages: Java: 11.0.17 - /usr/bin/javac npmPackages: @react-native-community/cli: Not Found react: 18.2.0 => 18.2.0 react-native: 0.71.7 => 0.71.7 react-native-macos: Not Found npmGlobalPackages: react-native: Not Found

Steps to reproduce

1. drag the list so that the 2nd item is the first in the list
2. observe the viewableItems

Snack, code example, screenshot, or link to a repository

https://snack.expo.io/@tantommy/intelligent-churros

[github-actions[bot]]

:warning:

Newer Version of React Native is Available!

:information_source:

You are on a supported minor version, but it looks like there's a newer patch available - 0.71.8. Please upgrade to the highest patch for your minor or latest and verify if the issue persists (alternatively, create a new project and repro the issue in it). If it does not repro, please let us know so we can close out this issue. This helps us ensure we are looking at issues that still exist in the most recent releases.

[cojo]

Just adding our voice here to confirm that this issue still persists in the very latest version, 0.75.2 of React Native.