Sorry, I didn't mean to blame you. My real problem is, I have an NFS server based on Debian 12 in the office that gets stuck every other week. nfsd just stops and cannot be killed, see #1071562. *This* is the bug report not making any progress.
All I can do is trying to improve the NFServer, eg by installing the most recent nfs-utils and an up-to-date kernel. If this doesn't help I have to move back to Debian 11, or ditch Debian in favor of RHEL.