4.1.12 bug: sometimes “no articles found” shown but there are articles

Hi

I have another problem:

When i click on some categories in my catalogue (i use “radio-button” mode) sometimes i get “no articles found” even when there are some in this category.
The error happens without any schema, sometimes it works, sometimes not.

Does anybody of you have the same problem and is there something that can be done to fix it?

Best,
Thomas