helpup

The issue was identified, by coincidence. The filter stopped working because of a permalink conflict. If a category slug had been used before — even years ago — then deleted and later reused, the filter would no longer function correctly. Changing the slug of the new or updated category resolves the issue.

So no multilingual issue, the slug did not exist prior on our French site. Therefore the filter worked over there.

Thanks. I understand you need more info, but this is too time consuming I’m afraid.
I was hoping it was a known issue. I will work around it by creating a different filter based on attributes.

Done. And thanks again. Especially @shsajalchowdhury!

Sure, see:

• This reply was modified 5 months, 3 weeks ago by helpup.

Thanks. We rolled back.

It’s annoying how many bugs the Mollie plugin keeps having. This is not the first time an update causes issues.

Thank you. It seems it’s our host that’s causing the issue.