[Bug]: fresh install, in markdwon editor, hitting ctrl+del does not delete the word in front of cursor

[liquidat]

Describe the bug
When writing text in the markdown editor, the command to delete a word in front of the cursor (ctrl+del) does not remove the word. Instead, nothing happens.

This behavior was first observed after an update to version 31. Version 30 did not have this problem.

To Reproduce
Steps to reproduce the behavior:

1. Install a fresh nextcloud with podman run -d --rm -p 8080:80 nextcloud:apache
2. Open web frontend in a browser (Firefox, Chrome tested), set username and pwd, open the files section of nextcloud.
3. Create a blank markdown file.
4. Write a word in the new markdown file.
5. Move the cursor in front of the word, hit ctrl+del to remove the word.
6. Watch that nothing happens.

Expected behavior

The key combination ctrl+del should just remove the word in front of the cursor.

The behavior of nothing happening is inconsistent with previous behavior and also inconsistent with other text editing we have in other web pages (like github) or programs (like openoffice, word, etc.)

Screenshots

N/A

Server details:

• Nextcloud version: [31.0.7]
• PHP Version: whatever is included in the corresponding docker images
• Database: tested on SQlite and Posgresql

Client details:

• OS: Ubuntu
• Browser: Firefox, verified in Chrome
• Browser version: Firefox 140.0.4, Chrome 138.0.7204.157
• Device: desktop

[mejo-]

This is reproducible in latest Text, but not in Tiptap on their demo page. So probably something on our side.