On update, zfs-fuse-0.7.2.2-27.fc37.x86_64 emitted:

| […]
|   Ausgeführtes Scriptlet: zfs-fuse-0.7.2.2-23.fc37.x86_64                                                                                                                              5/5 
| Removing files since we removed the last package
| […]

This felt odd as the package zfs-fuse definitely remained on the system.

The relevant %postun section reads:

| %postun
| %systemd_postun_with_restart zfs-fuse.service 
| echo "Removing files since we removed the last package"
| rm -rf /var/run/zfs
| rm -rf /var/lock/zfs

This seems to be the result of a logic error introduced by commit 1c50d5e79b9266a45f91d70eacec10fb745529f1; prior to that, %postun read:

| if [ $1 -ge 1 ] ; then
|     echo "Restarting since we have updated the package"
|     /sbin/service %{name} condrestart >/dev/null 2>&1 || :
| else
|     echo "Removing files since we removed the last package"
|     rm -rf /var/run/zfs
|     rm -rf /var/lock/zfs
| fi

This was changed to:

| /bin/systemctl daemon-reload >/dev/null 2>&1 || :
| if [ $1 -ge 1 ] ; then
|     # Package upgrade, not uninstall
|     /bin/systemctl try-restart zfs-fuse.service >/dev/null 2>&1 || :
|     echo "Removing files since we removed the last package"
|     rm -rf /var/run/zfs
|     rm -rf /var/lock/zfs
| fi

I. e., the "else" line was omitted.  AFAICT, this is not the intended behaviour.

Reproducible: Didn't try