This seems to have pretty much gone away in 13.2 now. I doubt I could further this since I am now in Tumbleweed. That said, I have seen this manifest itself, kind of, during another bug and the workaround for both (in Tumbleweed) is to log out as that user, log in as root, clear the KDE cache, log back in but again I think in the case of Tumbleweed it's just a side-symptom of another issue.