react / react/react-native

[Android] Last emoji in a Text is cut off when the text contains the 🫨 emoji (U+1FAE8)

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描述

Description

A <Text> whose content contains the 🫨 emoji (U+1FAE8, Unicode 15.0) renders with the last emoji of the line partially or fully cut off at specific text widths on Android. iOS is unaffected.

What we verified:

  • The 🫨 emoji is the trigger. We compared emoji suffixes of the same length (14 emoji) at the same text widths: a sequence containing 🫨 (😂🙁☠️😠🤔🥶🫨😺👏🏻🙁😂🥶😂😠) clips; 14 keycap sequences (1️⃣…🔟) and 14 single-codepoint emoji (🔴🟠🟡…) do not. Replacing 🫨 with another emoji in the failing sequence stops the clipping.
  • Width-dependent. Only strings whose width lands near the line-wrap boundary clip; adding or removing one letter makes the bug appear or disappear.
  • Device-dependent. Different devices clip at different string lengths (verified on Huawei P30 Pro VOG-L29 / Android 10 and a Samsung device; exact failing rows differ).
  • Version- and architecture-independent. Reproduces identically on RN 0.73 (old architecture) and RN 0.83.6 (new architecture) in the same app.
  • Not markdown/library related. Reproduces with a bare <Text>.
Steps to reproduce
  1. Clone https://github.com/mariia-korzun/EmojiEndClipRepro — a fresh community template where only App.tsx changed. It renders a sweep of 1–40 letters + a 14-emoji suffix in several layouts (chat bubble, fixed width, full width) plus a no-emoji control section, with the three suffix constants for comparison.
  2. yarn install && yarn android on an affected device.
  3. Scroll the EMOJI section: several rows show the last emoji clipped or invisible. The CONTROL section never clips. Replace 🫨 in the suffix — no row clips.

Expected: the trailing emoji is fully visible (as on iOS, and as with sequences without 🫨). So 😠 in the end should be visible

Actual: at specific widths the last emoji of the line is cut off. Screenshot attached.

With colors and numbers emojis all fine. Issue just when 🫨 in list. So 😠 in the end not visible

Image Image Image
React Native Version

0.83.6

Affected Platforms

Runtime - Android

Output of npx @react-native-community/cli info
System:
  OS: macOS 26.5.2
  CPU: (12) arm64 Apple M3 Pro
  Memory: 133.59 MB / 36.00 GB
  Shell:
    version: "5.9"
    path: /bin/zsh
Binaries:
  Node:
    version: 20.19.4
    path: /Users/mariiakorzun/.nvm/versions/node/v20.19.4/bin/node
  Yarn:
    version: 3.6.4
    path: /Users/mariiakorzun/.nvm/versions/node/v20.19.4/bin/yarn
  npm:
    version: 10.8.2
    path: /Users/mariiakorzun/.nvm/versions/node/v20.19.4/bin/npm
  Watchman:
    version: 2024.11.11.00
    path: /opt/homebrew/bin/watchman
Managers:
  CocoaPods:
    version: 1.16.2
    path: /opt/homebrew/bin/pod
SDKs:
  iOS SDK:
    Platforms:
      - DriverKit 25.5
      - iOS 26.5
      - macOS 26.5
      - tvOS 26.5
      - visionOS 26.5
      - watchOS 26.5
  Android SDK:
    API Levels:
      - "31"
      - "33"
      - "34"
      - "35"
      - "36"
    Build Tools:
      - 33.0.0
      - 33.0.1
      - 34.0.0
      - 35.0.0
      - 36.0.0
    System Images:
      - android-29 | Google Play ARM 64 v8a
      - android-33-ext5 | Google Play ARM 64 v8a
      - android-33 | ARM 64 v8a
      - android-33 | Google APIs ARM 64 v8a
      - android-33 | Google Play ARM 64 v8a
      - android-34 | Google APIs ARM 64 v8a
      - android-36 | Google Play ARM 64 v8a
    Android NDK: Not Found
IDEs:
  Android Studio: 2024.3 AI-243.22562.218.2431.13114758
  Xcode:
    version: 26.6/17F113
    path: /usr/bin/xcodebuild
Languages:
  Java:
    version: 17.0.10
    path: /usr/bin/javac
  Ruby:
    version: 2.6.10
    path: /usr/bin/ruby
npmPackages:
  "@react-native-community/cli":
    installed: 20.0.0
    wanted: 20.0.0
  react:
    installed: 19.2.0
    wanted: 19.2.0
  react-native:
    installed: 0.83.6
    wanted: 0.83.6
  react-native-macos: Not Found
npmGlobalPackages:
  "*react-native*": Not Found
Android:
  hermesEnabled: true
  newArchEnabled: true
iOS:
  hermesEnabled: Not found
  newArchEnabled: false
Stacktrace or Logs
-
MANDATORY Reproducer

https://github.com/mariia-korzun/EmojiEndClipRepro

Screenshots and Videos

No response

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  2. 在 Issue 下留言说明你要接手 —— 这能避免两个人做同样的事。
  3. Fork 仓库,在一个分支上完成修改。
  4. 提交 Pull Request,并在描述里引用这个 Issue 编号。

调研方向

从必需的 EmojiEndClipRepro repository 及其 App.tsx 开始,然后在受影响的 Android 设备上运行 yarn install && yarn android。比较 EMOJI 和 CONTROL sections,以及包含 🫨 的 suffixes;完成的标准是:末尾的 emoji 在之前失败的宽度下仍保持完全可见,且不会导致其他 layouts 或 emoji sequences 出现回归。

由索引模型根据 Issue 内容生成。

评估

技术栈
android, react-native
领域
mobile
Issue 类型
缺陷
难度
4/5
预计耗时
3-5 天
活跃度
活跃
描述清晰度
基本清楚
新手友好度
48/100

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