Cursor not in right position when in empty line in a code block.

[Mirone]

Please save me some time and use the following template. In 90% of all issues I can't reproduce the problem because I don't know what exactly you are doing, in which environment, or which y-* version is responsible. Just use the following template even if you think the problem is obvious.

Checklist

• Are you reporting a bug? Use github issues for bug reports and feature requests. For general questions, please use https://discuss.yjs.dev/
• Try to report your issue in the correct repository. Yjs consists of many modules. When in doubt, report it to https://github.com/yjs/yjs/issues/

Describe the bug
Now I have client A and client B.

1. When I move both client A's cursor in a newline in a codeblock.
2. Now I cannot move client B's cursor at that new line.
3. Then I switch back to client A, I find the position of the cursor is not right and I cannot move it to that new line.

To Reproduce
Steps to reproduce the behavior:

1. Go to https://github.com/Saul-Mirone/prosemirror-yjs-bug-reproduce
2. Clone the repo
3. Run pnpm install && pnpm dev
4. See error

Expected behavior
Cursor at right position.

Screenshots
If applicable, add screenshots to help explain your problem.

Screen.Recording.2022-06-01.at.23.04.50.mov

Environment Information

• Chrome 102
• Latest Yjs