@Ondřej-Šutera First of all sorry for the delays, mail notifications to this forum don't seem to work, i keep trying to reset the settings but to no avail.
I did check multiple locations and the behavior was location-independent.
As of today, I can't reproduce the behavior either, so I guess we have to archive this. Deleting cookies / website data and reinstalling the app did not change anything back when I had the issue though.