I was wrong. this commit https://github.com/openSUSE/plasma-opensuse/commit/2611468a476b8de5191f228c6c0d7e2bb75e236d is where the bug was introduced. The problem is that the package `distribution-logos-openSUSE-icons` is not installed by default. It should probably be added as a dependency of the distribution info kcm but i am no expert. By installing the package the bug will be fixed.