Fix for this issue is now available in the latest update of InDesign 2020 – that is, InDesign 15.0.1
In the Creative Cloud Desktop application, click on the Updates section on the left. You should be able to see the Update available for InDesign. Please update your InDesign application to this version to try out the fix.
Let us know in the comments section if you face any problem with the updation process.
Adobe InDesign TeamBob Nathans commented
This has become a significant problem. I've rolled back the installed version of Acrobat and this improves tings somewhat. Adobe needs to deal with this in a proper manner. Clean installation of Creative Cloud, Acrobat & InDesign does not cure the problem for us.