I have a problem with hotspots in Edge.
After inserting a hotspot and clicking on it, a black box appears. It is visible in the attached picture (the red frames are a fragment of the picture). In other browsers, it is ok.
I have the impression that when I clicked, the hotspot border appears
I have a problem with image maps. They are NOT responsive. If you're building sites to be viewed on mobile & tablet devices (as well you should), there are better ways of creating navigation without using image maps. Do a Google search for "removing outlines on image map hotspots." You'll find plenty of answers from 8-10 years ago when web designers still used them.
That said, removing outlines from navigation on focus is not recommended for usability reasons.