False "Slot invoked outside of the render function" warning with multiple async components in Suspense

[cernymatej]

Vue version

3.5.31

Link to minimal reproduction

https://play.vuejs.org/#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

Steps to reproduce

1. create a <Suspense> boundary with two async components as children
2. the first async component (AsyncA) must resolve slower (multiple microticks via await Promise.resolve().then().then())
3. the second async component (AsyncB) must resolve faster (single microtick via await Promise.resolve()) and render a component tree that forwards slots (e.g. Outer -> Inner -> slot content)

What is expected?

No warnings. The slot is invoked correctly inside a render function.

What is actually happening?

A false Slot "default" invoked outside of the render function warning is shown.

System Info

Any additional comments?

I think that this is a microtask ordering issue between withAsyncContext and registerDep in Suspense.

From my quick testing, the currentInstance of AsyncA seems to leak into AsyncB. If that is the case, this means that the effect scope leaks too, which could cause other problems with reactivity cleanup.