@Suty I'm in Catalonia (Spain), using Edge on Windows 10, both with the latest updates applied. More or less same problem here. From approximately a week ago, Windy is deadly slow, literally unable to do anything with it. But only at zoom levels with grey map. In the detailed zoom with tiles from mapy.cz, the thing runs well.
BTW, at same time. in Chrome, all runs with no issues.
I hope this helps, wish we could fix it.
Regards,
Joan