I fixed it by not using UIViewController on the page. Don't know that was the exact problem though since the view was dismissing at seeming completely unrelated timing.

I am in the exact same situation right now... Why are there no answers after a year?

I just had to detect isPressed state in ButtonStyle and trigger the animation. It was pretty simple..

Updating Unity to 2022.3.14f1 solved the issue (and caused another error seems not related to the issue).

The issue first appeared more than 3 months ago. https://forum.unity.com/threads/project-wont-build-using-xode15-release-candidate.1491761/#post-9341597 I guess both the Unity and the Xcode developers have no intension to fix this.. I posted the issue to the Flutter repo. https://github.com/flutter/flutter/issues/138938