Problem continues with 6.4.0-150600.23.22-default on 15.6, 6.11.0 on TW and Fedora, and 6.10.11 on Debian. Wouldn't it help at the upsteam level to know the date range from which 6.4's backports came? I wouldn't expect any but an openSUSE backporting team member to be able to provide that. No one but me has touched the upstream report so far.