Deleting a line is impossible

Describe the bug
This bug only appears on my Android Browsers.
When you try to delete a line, the cursor does not jump to the previous line. The line is not deleted
However, the content of the previous line is displayed in the keyboard preview and characters are also deleted there, but without any effect on the file.

To Reproduce
Steps to reproduce the behavior:

1. Go to any text file
2. try to remove characters till the line is empty, try to remove the line
3. cursor does not jump up, line is not removed

Server details:

• Text app version: 3.9.1
• Nextcloud version: 28.0.4

Client details:

• OS: Android Lineage OS 20
• Browser: Firefox, Vivaldi

Insert your Nextcloud log here

Insert your browser log here, this could for example include:

a) The javascript console log
b) The network log
c) ...

Start by reproducing the issue in a text file using Firefox or Vivaldi on Android, following the listed deletion steps. No source file or test is identified in the issue; done means deleting the final character on a line moves the cursor to the previous line and removes the empty line without affecting only the keyboard preview.