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.
InDesign TeamMacBee commented
Hi. I'm also now having this problem, now i've updated my OS to High Sierra.
(i preferred Yosemite as everything was faster, but had to due to upgrades).
Indeed, if the application frame requirement/bug can be fixed asap that would be 'welcome'.
With frame is a very cumbersome way of working costing me a lot of time.