Exercise: Backspace doesn't work in 'Problem' box

[HawKhiem]

Describe the bug

I was testing PR #10332 when I noticed that I couldn't use Backspace to delete characters in the Problem box. I could still use Ctrl X and other commands to delete the text but Backspace doesn't seem to work. I couldn't delete spaces with Backspace either. I think this is not related to the mentioned PR, because I encountered it on a different PR, when trying to create an exercise. Backspace still works like normally in other places.

To Reproduce

1. Go to any course
2. Try creating an exercise
3. Type something into the Problem box
4. See error

Expected behavior

Backspace should work like it normally did.

Screenshots

No response

Which version of Artemis are you seeing the problem on?

7.10.1

What browsers are you seeing the problem on?

Other (specify in "Additional context")

Additional context

Brave

Relevant log output

[NadeoWolf]

The problem occurs not only with Brave but also with Chrome and Firefox. And Version 7.10 is also affected.

[angatha]

Behaviour changed from 7.10.0 to 7.10.2 and within a line backspace works but if the curser is at the begin of a line, it still does not delete the \n.