Unwanted line break is inserted when pasting some text immediately after undo action

Summary

Unwanted line break is inserted when pasting some text immediately after undo action.

Environment

• Collaborative editing is enabled

Steps to Reproduce

1. Open a new page in edit mode
2. Paste some text
3. Undo (Ctrl + Z)
4. Paste the text again

Expected Results

Unwanted line break shouldn't be inserted.

Actual Results

Unwanted line break is inserted right before the pasted text.