Hello,
We uploaded the file with fix to your skalkur.styr.fo so you may check it there. We checked before and after (the problem was solved)
To upload file with the fix on your another skalkur.fo web-site please, follow the instructions:
1/ Download file here -> dropmefiles.com.ua – https://dropmefiles.com.ua/ua/4wxNkhXEv
2/ Upload it by next path -> xstore/js/ajax-filters.min.js
Also, it will be included in the next theme update!
Regards