We’ve been able to reproduce the issue and it is currently under investigation.
Thank you for your support. The issue is now fixed in the latest update of InDesign.
Please upgrade to the new InDesign 14.0 from your Creative Cloud Application.
If you are unable to see the update yet, click on the menu (three dots) on the top right corner of Creative cloud app and click on “Check for App Updates”.
Let us know your feedback in the comment section.
An error occurred while saving the commentAnonymous commented
This is happening to me too. Its always the Swatches panel and whatever else I have attached to it. I thought CC Libraries might be the culprit (I had that on another tab) but that was not so.
EVERY time I open InDesign the panels attached to my Swatches tab do not load (F5 shortcut key).
I've deleted my old Workspace file and made a new one.
Also deleted preferences and that didn't help at all.
Using InDesign 13.1 on OS X 10.12.6