Small issue with Chromium-ungoogled after last kde upgrade

I wouldn't even post this minor item except that someone mentioned the same problem in the Slackware chatroom the other day so I know I'm not the lone ranger. As stated above I am running the latest Chromium-ungoogled and it has been flawless as usual (thank you Eric). After the latest kde updates there is a curious problem in that the minimize arrow, diamond and X symbols in the far upper right corner have disappered. They are there because they work if you click on the correct blank area, just not visible. This is the only application to exhibit this behavior. Everything else shows the symbols. Just wondering if anyone else sees this?? It is trivial but curious.