Christian Schmitz composed on 2019-03-01 10:43 (UTC-0300):
I have installed opensuse tumbleweed upgraded few days ago. Since few days (after last update) i found some extraneous folders in my home. They have 2 characters and sometimes AU/ bJ/ *A/
Check the opensuse and opensuse-support mailing list archives. This was reported by Plasma users. IIRC the fix has been found, but I don't remember if it had made the mirrors yet or not. It might be gone already if you update again.