App crashes when using router-view, transition, suspense and teleport

[Jazcash]

Vue version

3.2.47

Link to minimal reproduction

https://codesandbox.io/p/sandbox/vue-router-suspense-transition-teleport-bug-e47p0j?file=%252Fsrc%252FApp.vue

Steps to reproduce

1. Click C a few times, notice app is fine
2. Click B
3. Now click C again, app will crash

What is expected?

App should not crash

What is actually happening?

App crashes with Uncaught (in promise) TypeError: node is null

System Info

No response

Any additional comments?

I initially thought this issue was a problem with PrimeVue and raised an issue there, but after narrowing it down further it seems more like a core vue problem.

[wucdbm]

Sounds to me that this could be somehow related to #7086

Basically, in place of a after SSR it tries to render another set of elements, but the template tag does not really have a tag, so parent is null or undefined.

It could be similar behaviour with transition?

[edison1105]

a note here:
the root cause is that the suspense resolves before the fallback node is mounted. This caused component B to be unmounted twice, causing this issue when it was unmounted the second time.

[nmeierpolys]

Does anyone have a workaround or plans to merge one of the proposed fixes? I'm seeing the same thing and it feels like an issue that warrants some attention.