File associations html / localhost (after Update 2021-12-10?)

After last Update, I found that html-pages were connected to KATE; no problem, I changed it in SystemSettings > text > html. That works.
Nevertheless, if I click an URL (in AKREGATOR), f.e. http://localhost:8111/import?url= (that should direct into JOSM) again KATE is started.
How to fix this?
Thank you, Michael