Lexical version: 0.44

Steps To Reproduce

1. Paste specific content:

   hello world

   ```

   echo hello world

   ```

2. Press enter on the last line ( with ```)

3. Trigger Undo command

Link to code example: https://playground.lexical.dev/#doc=H4sIAAAAAAAAE9VUwWrDMAz9lfLOpqSjW1p_wM6DHMcgJtYag2sFRelWSv59ON3ostt6WXey9ITee5KNTyAflKVSpwR7gjBrPps2RC-UYJ9_JJ7UhQhbGLyy7J1O4Z49wSJlJMKg12PMAAyU3hUWLcXIizeW6DN47HJ5qhkcSPrACXY1vhj4INTolKchxotOZgvJUzprfnJ0TtxOXNfOiM66jxeHOa2-XI1mNtWfiF6_yrqub26F109DTcuLW34d__2ifi8z_QIzq6NBdL1W7kAedlWW2_L-7mGz2RalQc-DNLnvKbrjTnhI_ns3iuV6vSwwfgB-F9tGbgQAAA

The current behavior

Editor crushes, backticks transformation are not undone

The expected behavior

Editor does not crush, code block removes and return backticks

Impact of fix

It's hard to say what exactly is causing the editor to crash, as I discovered this bug when using content while researching other issues