Adobe acrobat reader DC random freezes after opening document.

I installed version 2020.006.20042  on my RDS windows 2012 r2 farm. Users now have the issue that sometimes their document opens but is instantly frozen. (they cant scroll, close or do anything) Seen from task manager the program is not in an unresponsive state or using cpu. (It is just running normal from this perspective) You can kill the programm from taskmanager and most of the times the user can open a couple of PDF documents again.

I tried already to remove and reinstall the software but didn't help me much. I have read some other forums about some known issues and created (gpo) registry entries for protected mode / enhanced security, but also did not do the trick.  

Someone an idea what to try or to do? thanks in advance!

I created a Process dump of a reader which had the issue

AcroRd32.DMP  (318MB)