Description

I used a clean installation: only WordPress 5.9 Beta 1 with Twenty Twenty Two theme. Later, I've added Gutemberg, but nothing changed.
The problem is in footer block. I added a button. But, when I want to delete it with "Remove button" in submemu, the system says: "The editor has encountered an unexpected error", and two buttons: "Attempt recovery" and "Copy the error". "Copy the error" doesn't seem to do nothing. When I click "Attempt recovery", I go back to the starting point.
Ty.

Step-by-step reproduction instructions

1.- Add a button to footer blok.
2.- Try to delete it in submenu "Remove button".

Screenshots, screen recording, code snippet

https://drive.google.com/file/d/1CnneSjz6pt9d1yfeahbBw0VRjUgILVvy/view?usp=sharing

Environment info

• WordPress 5.9 Beta 1
• Gutenberg 12.0.2

Please confirm that you have searched existing issues in the repo.

Yes

Please confirm that you have tested with all plugins deactivated except Gutenberg.

Yes