RangeError: Position out of range when deleting after multi-column block

[guizmooi]

What’s broken?

When using the multi-column feature, continuously pressing Backspace after typing in a block following a multi-column layout causes a runtime error:

RangeError: Position X out of range

This crashes the editor and breaks further interaction.

What did you expect to happen?

• Text should be deleted normally
• Editor should remain stable
• No runtime errors should occur

Steps to reproduce

1. Insert a multi-column block (e.g., 3 columns)
2. Move cursor to the next block (below the columns)
3. Type some text (e.g., aaa)
4. Press and hold Backspace to delete continuously

BlockNote version

"@blocknote/xl-multi-column": "0.47.1"

Environment

Chrome

Additional context

• This issue appears to be related to how the multi-column structure interacts with deletion logic.
• Likely caused by an invalid ProseMirror transaction when deleting across structural boundaries.
• Happens more frequently when holding down Backspace (rapid consecutive deletes).

Contribution

• I'd be interested in contributing a fix for this issue

Sponsor

• I'm a sponsor and would appreciate if you could look into this sooner than later 💖

[YousefED]

I couldn't replicate this bug exactly, but did find a related bug that might be causing this, addressed in #2629