I had some walks in the Polish city of Opole, which shows correctly:
However I also noticed a “Rejon opolski” (actually two!):
When clicking the button to go to OSM, it turns out these are religious administration regions. I tried to do some research (I found a page saying that I should delete the “admin_level=7” tags from those regions) and posted a question on the OSM forum, which only led to a long discussion. Summary: it’s a CityStrides problem, because that unit should not be imported.
Now this is all Greek to me. I understand CityStrides thinks this is a city, but why? And is there an option to remove it? Not that it disturbs me, of course, but… well.