Steam friends list dropdown bug

Hello all,
when using steam on kubuntu 22.04.04 lts, the dropdown menu in friends list is buggy. When you try to click on items in the dropdown bar, the dropdown closes before u click. Seems to be a bug for a while now. Found forum posts reporting the problem back then using kde desktop and ubuntu 12. Where would be the right address to file a bug report? What part of the desktop would this even have to do with?

Greetings
Pius