Draw.io broken when used within table cell

[geins]

Describe the bug TinyMCE-Mode: Using Draw.io works as expected within a paragraph. BUT if I start a drawing within a table cell, I can edit my initial drawing. But after I save it, it acts like an ordinary image. I cannot open the drawing in draw.io-editor anymore.

Steps To Reproduce Steps to reproduce the behavior:

1. Open a page in edit-mode (tinymce)
2. Create a table
3. create a drawing within table cell and save it in draw.io editor.
4. Try to edit the drawing afterwards.

Expected behavior See above

Your Configuration (please complete the following information):

• Exact BookStack Version (Found in settings): BookStack v21.08.3
• PHP Version: 7.4
• Hosting Method (Nginx/Apache/Docker): Apache
• tested on safari&Chrome OSX and chrome win

Thank You so much for your help!

[geins]

Ah, I see, Related to #1304

[kmpm]

Probably related to issue #2945 as well.