Description:
While writing text in Writer, it starts to copy parts of the text. I cannot delete them, it will delete the original text as well. The upper copy cannot be exited by the arrows, it will flip to the start of the doubled text again over and over. Clicking with the mouse works. I can go in between the text blocks and insert enters in between. It started about 3 months ago and has been getting worse every update I make. I use Debian Bullseye (testing) from the repositories. The only pulgin is LanguageTool for spellchecking. 

Steps to Reproduce:
1.write a text
2.make a copy-paste
3. it happens most of the times.

Actual Results:
1.write a text
2.make a copy-paste
3. it happens most of the times.

Expected Results:
double text that is not removable


Reproducible: Sometimes


User Profile Reset: No



Additional Info:
just copy paste, no double texts