Multiline TextInput starts using more space for next line well before wrapping actually happens

[chrisglein]

Problem Description

Multiline TextInput is creating more space than needed, and wrapping in weird ways while typing.

From the React Native Gallery:

https://github.com/user-attachments/assets/f86c6e56-5483-4023-9d78-6d2c2fcab856

Steps To Reproduce

1. Launch React Native Gallery (preview, Fabric version)
2. Go to Text page
3. Type into multiline text input
4. Note that input starts wrapping another line of blank space before the text actually needs to wrap

Expected Results

Input line doesn't create extra vertical space until needed

CLI version

19.1.1

Environment

System:
  OS: Windows 11 10.0.27944
  CPU: "(24) x64 AMD Ryzen Threadripper PRO 3945WX 12-Cores     "
  Memory: 36.79 GB / 63.86 GB
Binaries:
  Node:
    version: 18.18.0
    path: C:\Program Files\nodejs\node.EXE
  Yarn:
    version: 1.22.19
    path: C:\Program Files (x86)\Yarn\bin\yarn.CMD
  npm:
    version: 9.8.1
    path: C:\Program Files\nodejs\npm.CMD
  Watchman: Not Found
SDKs:
  Android SDK: Not Found
  Windows SDK:
    AllowDevelopmentWithoutDevLicense: Enabled
    AllowAllTrustedApps: Enabled
    Versions:
      - 10.0.19041.0
      - 10.0.22621.0
      - 10.0.26100.0
IDEs:
  Android Studio: Not Found
  Visual Studio:
    - 17.14.36408.4 (Visual Studio Community 2022)
Languages:
  Java: Not Found
  Ruby: Not Found
npmPackages:
  "@react-native-community/cli":
    installed: 19.1.1
    wanted: 19.1.1
  react:
    installed: 19.1.0
    wanted: 19.1.0
  react-native:
    installed: 0.80.2
    wanted: 0.80.2
  react-native-windows:
    installed: 0.80.0-preview.6
    wanted: 0.80.0-preview.6
npmGlobalPackages:
  "*react-native*": Not Found
Android:
  hermesEnabled: true
  newArchEnabled: true
iOS:
  hermesEnabled: Not found
  newArchEnabled: Not found

Community Modules

None

Target React Native Architecture

New Architecture (WinAppSDK) Only

Target Platform Version

None

Visual Studio Version

None

Build Configuration

None

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

No response