This is a screen recording from the Lexical playground:

Lexical version: latest on playground

Steps To Reproduce

1. Select a table and copy it to clipboard
2. Select multiple cells of the table
3. Right click and paste

The current behavior

The copied content from the clipboard gets inserted, including a table, within the table.

The expected behavior

The table should be stripped out when pasting into a table.

Impact of fix

This could prevent some abuse of content blocks.