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Jumpy sticky section headers in SectionList

See original GitHub issue

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Environment

React Native Environment Info: System: OS: macOS High Sierra 10.13.5 CPU: (8) x64 Intel® Core™ i7-4770HQ CPU @ 2.20GHz Memory: 99.75 MB / 16.00 GB Shell: 5.3 - /bin/zsh Binaries: Node: 8.12.0 - /usr/local/bin/node Yarn: 1.12.3 - /usr/local/bin/yarn npm: 6.4.1 - /usr/local/bin/npm Watchman: 4.9.0 - /usr/local/bin/watchman SDKs: iOS SDK: Platforms: iOS 11.4, macOS 10.13, tvOS 11.4, watchOS 4.3 Android SDK: API Levels: 17, 19, 23, 24, 25, 26, 27, 28 Build Tools: 23.0.1, 25.0.0, 25.0.1, 25.0.2, 25.0.3, 26.0.1, 26.0.2, 26.0.3, 27.0.1, 27.0.3, 28.0.2, 28.0.3 System Images: android-17 | Google APIs Intel x86 Atom, android-19 | Google APIs Intel x86 Atom, android-21 | Google APIs ARM EABI v7a, android-22 | Google APIs Intel x86 Atom, android-22 | Google APIs Intel x86 Atom_64, android-24 | Google APIs Intel x86 Atom, android-24 | Google Play Intel x86 Atom, android-25 | Google APIs Intel x86 Atom IDEs: Android Studio: 3.2 AI-181.5540.7.32.5056338 Xcode: 9.4.1/9F2000 - /usr/bin/xcodebuild npmPackages: react: 16.6.3 => 16.6.3 react-native: 0.57.8 => 0.57.8 npmGlobalPackages: create-react-native-app: 1.0.0 react-native-ci-tools: 1.1.0 react-native-cli: 2.0.1 react-native-git-upgrade: 0.2.7

Description

Section header jumps a lot when stickySectionHeadersEnabled prop is passed. When rendering a section with large number of items, and scrolling to it, the header keeps on jumping. Also, the scroll keeps on going backwards.

One thing to note is that, onScroll is never fired when this behaviour is happening. Although, onViewableItemsChanged keeps on firing.