LineHeight is working weird on specific fonts (Android Only)
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Description
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Description
Multiline texts don't have same line height on specific fonts. (NotoSansCJK= Source Hans Sans, NotoSerifCJK=Source Hans Serif)
It happens on first line.



React Native version:
info Fetching system and libraries information...
System:
OS: macOS 10.15.5
CPU: (12) x64 Intel(R) Core(TM) i7-9750H CPU @ 2.60GHz
Memory: 7.08 GB / 32.00 GB
Shell: 5.7.1 - /bin/zsh
Binaries:
Node: 14.4.0 - /usr/local/bin/node
Yarn: 1.22.4 - /usr/local/bin/yarn
npm: 6.14.4 - /usr/local/bin/npm
Watchman: 4.9.0 - /usr/local/bin/watchman
Managers:
CocoaPods: 1.9.2 - /usr/local/bin/pod
SDKs:
iOS SDK:
Platforms: iOS 13.5, DriverKit 19.0, macOS 10.15, tvOS 13.4, watchOS 6.2
Android SDK:
API Levels: 27, 28, 29
Build Tools: 28.0.3, 29.0.2, 29.0.3
System Images: android-29 | Google APIs Intel x86 Atom_64, android-29 | Google Play Intel x86 Atom_64
Android NDK: Not Found
IDEs:
Android Studio: 4.0 AI-193.6911.18.40.6514223
Xcode: 11.5/11E608c - /usr/bin/xcodebuild
Languages:
Java: 1.8.0_252 - /usr/bin/javac
Python: 2.7.16 - /usr/bin/python
npmPackages:
@react-native-community/cli: Not Found
react: 16.11.0 => 16.11.0
react-native: 0.62.2 => 0.62.2
npmGlobalPackages:
*react-native*: Not Found
Steps To Reproduce
- Set lineHeight properly. (not too small, large)
- and set fontFamily to custom font which has problem. (NotoSansCJK, NotoSerifCJK)
Expected Results
Every lines have same line height.
like this:


Snack, code example, screenshot, or link to a repository:
Android Native(No React Native) is fine. This font is NotoSansKR-Regular :

iOS is fine:

Text Style:
{
padding: 10,
fontSize: 12,
lineHeight: 28,
}
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reproducing the Android-only line-height difference in React Native 0.62.2 with NotoSansCJK or NotoSerifCJK, fontSize 12, and lineHeight 28. Compare multiline rendering with native Android and iOS; done means every line has the same height for the affected fonts without changing the behavior shown as correct on the other platforms.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- android, react-native
- Domain
- mobile
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Quiet
- Clarity
- Mostly clear
- Newbie friendliness
- 48/100