Thank you for reporting the issue to us.
We have fixed the issue in the latest version of InDesign, Id 14.0.3
Please upgrade your InDesign application to the latest version to try out the fix.
If you are unable to see the update yet, go to Creative Cloud desktop application, open the menu (three dots) from the top-right corner and click on ‘Check For App Updates’.
If you face any problems with the new update, do let us know in the comments.
You may also follow the below given link for the list of all fixed issues in Id 14.0.3
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This is present for the first time for me with the newest updates. Files that used to work when opened at the same time now lag and drag between steps. Close one file, everything is fine. Running on a 32gb PC with upgrade video card and SSD, so there shouldn't be any issue and wasn't before the newest updates.
I've deleted indesign, gotten rid of the settings, deleted all of CC, and ran the Cleaner Tool and nothing helps.