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When the system font size changes, the text sizes in the application are not updated #54037

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Description

@nexquery

Description

Please watch the video to understand the issue better.

import { View, Text, StatusBar } from "react-native";

export default function App() {
	return (
		<View style={{ flex: 1, justifyContent: "center", alignItems: "center" }}>
            <StatusBar animated={true} translucent={true} barStyle={"dark-content"} backgroundColor={"transparent"} />
			<Text style={{ fontSize: 14 }}>Hesap Defterim</Text>
		</View>
	);
}
2025-10-02.20-46-26.mp4

Steps to reproduce

npx @react-native-community/cli@latest init TestProject --package-name com.test.project
npx react-native run-android

React Native Version

0.81.4

Affected Platforms

Runtime - Android

Output of npx @react-native-community/cli info

System:
  OS: Windows 11 10.0.26200
  CPU: "(24) x64 AMD Ryzen 9 7900X 12-Core Processor            "
  Memory: 12.94 GB / 31.60 GB
Binaries:
  Node:
    version: 24.9.0
    path: C:\Program Files\nodejs\node.EXE
  Yarn: Not Found
  npm:
    version: 11.6.0
    path: C:\Program Files\nodejs\npm.CMD
  Watchman: Not Found
SDKs:
  Android SDK:
    API Levels:
      - "36"
    Build Tools:
      - 35.0.0
      - 36.0.0
      - 36.1.0
    System Images:
      - android-36.1 | Google Play Intel x86_64 Atom
    Android NDK: Not Found
  Windows SDK: Not Found
IDEs:
  Android Studio: AI-251.26094.121.2513.14007798
  Visual Studio: Not Found
Languages:
  Java: 17.0.16
  Ruby: Not Found
npmPackages:
  "@react-native-community/cli":
    installed: 20.0.0
    wanted: 20.0.0
  react:
    installed: 19.1.0
    wanted: 19.1.0
  react-native:
    installed: 0.81.4
    wanted: 0.81.4
  react-native-windows: Not Found
npmGlobalPackages:
  "*react-native*": Not Found
Android:
  hermesEnabled: true
  newArchEnabled: true
iOS:
  hermesEnabled: Not found
  newArchEnabled: Not found

Stacktrace or Logs

N/A

MANDATORY Reproducer

N/A

Screenshots and Videos

2025-10-02.20-46-26.mp4

Activity

  1. react-native-bot commented on Oct 2, 2025

    @react-native-bot
    Collaborator

    Warning

    Missing reproducer: We could not detect a reproducible example in your issue report. Reproducers are mandatory and we can accept only one of those as a valid reproducer:


    You can read more about about it on our website: How to report a bug.

  2. erenkulaksiz commented on Oct 9, 2025

    @erenkulaksiz

    does restarting app fixes the issue?

  3. nexquery commented on Oct 9, 2025

    @nexquery
    Author

    does restarting app fixes the issue?

    When I restart the application, the problem is fixed.

    Uygulamayı yeniden başlatınca sorun düzeliyor.

  4. Racha2004 commented on Oct 16, 2025

    @Racha2004

    could not reproduce as the reproducer is missing. instead reproduced issue creating a sample app. platform:Android

  5. devanshsaini11 commented on Oct 16, 2025

    @devanshsaini11
    Collaborator

    @nexquery Can you share a valid repro using Reproducer Template so it can be validated quickly

  6. RizzoG99 commented on Nov 5, 2025

    @RizzoG99

    Same issue on my Mobile app (Android - iOS). @nexquery have you find any solution?

  7. nexquery commented on Nov 5, 2025

    @nexquery
    Author

    Same issue on my Mobile app (Android - iOS). @nexquery have you find any solution?

    This problem seems to be fixed in version 0.82.1.

  8. RizzoG99 commented on Nov 5, 2025

    @RizzoG99

    @nexquery I have the same problem in latest version on iOS.
    @devanshsaini11 I have created a repo to reproduce the problem: ReactNativeFontSize

    On my own app if I have the app opened and I change font size by opening a new page the screen show correctly. Because it is a new instance. But with the view already created It seems that the text container doesn't update height and width.

  9. nexquery commented on Nov 5, 2025

    @nexquery
    Author

    @RizzoG99 This issue is not fully resolved in version 0.82.1.

  10. losikov commented on Nov 9, 2025

    @losikov

    System theme changes don't trigger useColorScheme() or Appearance.addChangeListener() on iOS

    On React Native 0.81.5, when the system theme (light/dark) changes while the app is running, neither useColorScheme() nor Appearance.addChangeListener() fires. The app only reflects the system theme after a restart.

    Steps to reproduce:

    1. Run app on iOS
    2. Change system theme in Settings
    3. Return to app
    4. useColorScheme() still returns old value
    5. Appearance.addChangeListener() callback never fires

    React Native Version: 0.81.5

    Affected Platforms: iOS only.

  11. priami93 commented on Nov 27, 2025

    @priami93

    Same issue here with 0.79.2

  12. RizzoG99 commented on Nov 28, 2025

    @RizzoG99

    Hi guys! ✋🏻

    By testing on physical Android (a Samsung Note 9 with Android 10) and by changing the system font size the app doesn't update and the font size remains the same 😕.

    On the emulator side, with Android 15, the system font size changes triggers the android activity update 👍🏻.

    I reproduce the problem with a vanilla project: ReactNativeFontSize.

  13. MarkusAbtion commented on Dec 16, 2025

    @MarkusAbtion

    I have this same issue.
    The UI doesn't update before the app has been completely closed and reopened.

  14. rknastenka commented on Dec 26, 2025

    @rknastenka

    Related #52895

  15. bharath2468 commented on Mar 1, 2026

    @bharath2468

    Hello Team, when can we expect a fix for this?

  16. tzw99556 commented on Mar 19, 2026

    @tzw99556

    Hi Team, when can we have a fix for this?

  17. react-native-bot commented on Sep 15, 2026

    @react-native-bot
    Collaborator

    This issue is stale because it has been open for 180 days with no activity. It will be closed in 7 days unless you comment on it or remove the "Stale" label.

  18. react-native-bot commented on Sep 15, 2026

    @react-native-bot
    Collaborator

    This issue is stale because it has been open 180 days with no activity. Remove stale label or comment or this will be closed in 7 days.

  19. added
    StaleThere has been a lack of activity on this issue and it may be closed soon.
    and removed
    StaleThere has been a lack of activity on this issue and it may be closed soon.
    on Sep 15, 2026
  20. MarkusAbtion commented on Sep 15, 2026

    @MarkusAbtion

    Any news?

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