Sorry - I don't understand the issue as you have described them - can you please clarify and perhaps use screenshots?
If a document is not behaving well then try
Open the IDML in InDesign Save the file as a new InDesign file with a new name See if the issue persists.
Try resetting your preferences: The easiest way to reset everything is to delete the InDesign preferences: as soon as InDesign starts to boot hold down Shift, Alt, Ctrl (and Apple/Cmd if working on a Macintosh). A dialog will appear asking to delete the InDesign Preferences, select 'Yes' on this dialog. Further info and instructions here if needed: https://helpx.adobe.com/in/indesign/kb/indesign-preferences-support-file-locations.html
I'm very sorry, but unfortunately I belong to the generation that doesn't speak perfect English - I used google translator here.
With the last Update 17.2, various errors crept in, which are also clearly confirmed in German forums/portals (FaceBook, MacUser).
– The working window can only be moved after several attempts and with great difficulty. – Text changes (font) are not displayed immediately. - add unnamed colors - no longer works. - "Convert to Outlines" fonts in circular path texts results in errors (missing letters) at the end of the text.