FYI if it could be related. I rarely use my iPad for data input but on my Mac I’ve had issues on 3 apps since 15.2 with secondary windows. Hookmark’s context window is dead in any app when in full screen mode. Finder, pages, and numbers have an infinitesimal
cursor focal point, almost un-grabable, sizing borders such as columns.
Unlikely to the be related, I think. iOS is a completely different beast, and there is not much shared code for the sharing extensions. Probably separate issue.