TextInput claims the responder on every selection change, even with no active touch

Description

Where: Libraries/Components/TextInput/TextInput.js, onSelectionChangeShouldSetResponder={emptyFunctionThatReturnsTrue} (line 607 on main today), with {...otherProps} spread before it so a caller cannot override.

What happens: the claim exists for drag-selection with a finger down, but it fires for every selection change the plugin walks, including ones caused by typing, whenever the plugin's touch counter is above zero (see https://github.com/react/react/issues/37571 for how that counter drifts). The focused input then holds the JS responder with no touch active, and the next tap outside it is dropped.

Fix: claim only while event.touchHistory.numberActiveTouches > 0, and let a caller pass their own onSelectionChangeShouldSetResponder. Verified in an app patch on RN 0.85.3.

Proposed change (against main, packages/react-native/Libraries/Components/TextInput/TextInput.js, line 607 in InternalTextInput). Claim only while there is an active touch, and let a caller override:

         onSelectionChange={_onSelectionChange}
-        onSelectionChangeShouldSetResponder={emptyFunctionThatReturnsTrue}
+        // The claim exists for drag-selection with a finger down. Typing
+        // also changes the selection, and with no touch active the input
+        // must not take the responder, or the next tap outside it is dropped.
+        onSelectionChangeShouldSetResponder={
+          props.onSelectionChangeShouldSetResponder ??
+          (e => (e?.touchHistory?.numberActiveTouches ?? 0) > 0)
+        }
         selection={selection}

The same line appears once more in the Android branch of the same file. We run this in production through patch-package against React Native 0.85.3.

Steps to reproduce

As described above

React Native Version

0.85.3

Affected Platforms

Runtime - iOS

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

System:
  OS: macOS 26.5.1
  CPU: (12) arm64 Apple M2 Max
  Memory: 264.73 MB / 32.00 GB
  Shell:
    version: "5.9"
    path: /bin/zsh
Binaries:
  Node:
    version: 24.11.0
    path: /Users/michaelsageryd/.nvm/versions/node/v24.11.0/bin/node
  Yarn: Not Found
  npm:
    version: 11.3.0
    path: /Users/michaelsageryd/dev/plantrail/client/plantrail_mobile/node_modules/.bin/npm
  Watchman: Not Found
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"
      - "35"
      - "36"
      - "36"
    Build Tools:
      - 35.0.0
      - 36.0.0
      - 36.1.0
      - 37.0.0
    System Images:
      - android-36 | Google Play ARM 64 v8a
    Android NDK: Not Found
IDEs:
  Android Studio: 2025.3 AI-253.32098.37.2534.15232325
  Xcode:
    version: 26.6/17F113
    path: /usr/bin/xcodebuild
Languages:
  Java:
    version: 17.0.18
    path: /Library/Java/JavaVirtualMachines/zulu-17.jdk/Contents/Home/bin/javac
  Ruby:
    version: 3.4.7
    path: /opt/homebrew/opt/ruby@3.4/bin/ruby
npmPackages:
  "@react-native-community/cli":
    installed: 20.1.0
    wanted: 20.1.0
  react:
    installed: 19.2.3
    wanted: 19.2.3
  react-native:
    installed: 0.85.3
    wanted: ^0.85.3
  react-native-macos: Not Found
npmGlobalPackages:
  "*react-native*": Not Found
Android:
  hermesEnabled: true
  newArchEnabled: true
iOS:
  hermesEnabled: true
  newArchEnabled: true

Stacktrace or Logs

No trace

MANDATORY Reproducer

Reproducer: https://github.com/facebook/react-native/pull/58449

Screenshots and Videos

No response

Bắt đầu tại packages/react-native/Libraries/Components/TextInput/TextInput.js ở hai vị trí xuất hiện onSelectionChangeShouldSetResponder trong InternalTextInput, sau đó kiểm tra reproducer bắt buộc PR #58449. Xác nhận rằng cả hai nhánh đều hỗ trợ điều kiện touch-history được yêu cầu và việc caller override. Hoàn tất khi các thay đổi lựa chọn không có touch đang hoạt động không giành responder, trong khi việc lựa chọn bằng thao tác kéo vẫn có thể giành responder và các caller có thể cung cấp handler riêng của mình.