SwiftUI-based filter content collapses after Fabric view recycling on iOS

[lujjjh]

Description

With SwiftUI-based filters enabled, Fabric view recycling can collapse the content inside RCTSwiftUIContainerView.

The outer RCTViewComponentView and _UIHostingView retain their expected height, but the internal SwiftUI hierarchy becomes zero-height.

As a result, the React Native child still has the correct frame but is invisible because its SwiftUI wrapper has zero height.

I reproduced this consistently on the two iOS versions I tested: iOS 16.0 and iOS 26.5. Disabling safe-area handling for the hosting controller fixed the issue on both versions.

Tested on React Native main at commit ad870da.

Steps to reproduce

1. Clone the reproducer:
   https://github.com/lujjjh/react-native-swiftui-filter-repro/tree/repro/ios-swiftui-filter-recycle
2. Install dependencies and prepare RNTester for iOS.
3. Build and launch RNTester.
4. Open the Playground tab.
5. Wait approximately 1.5 seconds.

Expected:
The orange content fills the purple 28×28 outline.

Actual:
Only the purple outline is visible because the internal SwiftUI wrapper has zero height.

React Native Version

0.87.0

Affected Platforms

Runtime - iOS, Build - MacOS

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

System:
  OS: macOS 26.5.2
  CPU: (18) arm64 Apple M5 Pro
Binaries:
  Node: 26.5.0
  Yarn: 1.22.22
  npm: 11.17.0
Managers:
  CocoaPods: 1.16.2
SDKs:
  iOS SDK: 26.5
IDEs:
  Xcode: 26.6/17F113
Languages:
  Ruby: 2.6.10

Stacktrace or Logs

There is no crash or JavaScript error.

RCTViewComponentView                         28
_UIHostingView<SwiftUIContainerView>         28
_UIInheritedView                              0
PlatformViewHost<UIViewWrapper>               0
UIView wrapper                                0
RCTViewComponentView child                   28

MANDATORY Reproducer

https://github.com/lujjjh/react-native-swiftui-filter-repro/tree/repro/ios-swiftui-filter-recycle

Screenshots and Videos

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This issue is waiting for author's feedback since 24 days. Please provide the requested feedback or this will be closed in 7 days.