bug: enter might error in Android Chrome

[TeemuKoivisto]

So as I was experimenting with BlockQuite, quite fascinating editor btw, I noticed that in mobile the user experience was a bit flaky.

Peeking into console, I noticed that there was actually an error that completely bugged out the editor.

Steps to reproduce

1. Open https://blocksuite-toeverything.vercel.app/?init in Android Chrome (both the latest versions)
2. Insert A + Enter three times
3. Backspace to original empty doc
4. Insert A + Enter again
5. Editor errors with: NotFoundError: Failed to execute 'insertBefore' on 'Node': The node before which the new node is to be inserted is not a child of this node.

blockquite-bug.mov

[L-Sun]

Thank you for your feedback. We have started addressing this issue.