Bug: ViewTransition can't be isolated

[istarkov]

React version:
"react": "19.2.3",
"react-dom": "19.2.3",

Steps To Reproduce

I have a Dialog wrapped with ViewTransition. Inside the dialog I’m using the Streamdown library.

Streamdown updates its blocks using startTransition. As a result, view transitions keep triggering while Streamdown is streaming.

It seems like there’s no way to isolate part of the tree so that startTransition inside the dialog doesn’t trigger transitions outside of it.

I can’t disable ViewTransition on the dialog during streaming, because the dialog needs the close animation.

I think view transitions must be executed somehow explicitly and not via startTransition itself.
Or I need a way like

<Isolate>
  ...startTransitions here would not cause view transitions to start
</Isolate>

PS: addTransitionType
And

::view-transition-group(*) {
  animation-duration: 0ms;
  animation: none;
}
...
:root:active-view-transition-type(video-grid-dialog) {
...
}

doesn't help, chrome flickers anyway