Where can I upload a zipped dump file? It's too large to post, for one, and has more info than needs to be public.
The issue with blue circle mouse prompt, screen stretch, etc., is related to library size in the sense that if the library is very small, everything in the stock library views responds too quickly for the issue to come up. I tried with an empty library, importing audio files. After a few thousand files, views with several panes of stats, for example, will take long enough to load that the screen will always stretch for a moment. As more files are added, or running import or tagging at the same time, stock views start to take long enough to load that this issue will come up.