[iOS 26] Touch blocked during entire zoom transition animation

[agru97]

Description

Touch is completely blocked for the full duration of Apple Zoom transitions (both push and pop). With standard slide_from_right it's barely noticeable, but zoom animations are longer so there's a clear ~0.5-1s window where the screen is fully rendered but doesn't respond to touches.

Steps to reproduce

1. Expo Router SDK 55 app with Stack navigator
2. List screen with Link.AppleZoom on items
3. Detail screen with Link.AppleZoomTarget
4. Tap an item — touches blocked during zoom in
5. Go back — touches blocked during zoom out

Screens version

4.22.0

React Native version

0.83.1

Platforms

iOS

Architecture

New Architecture (Fabric)

Device

iOS physical device

Acknowledgements

Yes

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[agru97]

The zoom transition example from the Expo docs reproduces this: https://docs.expo.dev/router/advanced/zoom-transition/

Any Expo Router SDK 55 app with Link.AppleZoom on a source screen and Link.AppleZoomTarget on a detail screen will show the issue — touches are blocked for the full duration of the zoom animation in both directions.

[kmichalikk]

Hi @agru97
For some time we have blocked interactions on transition due to JS/native navigation state going out of sync (updates are asynchronous and since iOS 26 doesn't prevent from, for instance, dismissing 3 screens at once, it resulted weird bugs).
We now have a better solution merged in #3584
And in #3631 we'll probably stop the blocking.

I'm guessing the latter patch will fix the problem - could you confirm that? Please make sure to have both featureFlags.experiment.{iosPreventReattachmentOfDismissedScreens, ios26AllowInteractionsDuringTransition} set to true.

[agru97]

@kmichalikk
Thanks!
the patch fixed the problem!