Super slow, timeout, and VM stuck while backing up, after updated to PVE 9.1.1 and PBS 4.0.20

FYI maybe not so important but we are still running PVE 8.4.1 with kernel Linux pm01 6.8.12-9-pve and are also having those issues with fully patched PBS
 
FYI maybe not so important but we are still running PVE 8.4.1 with kernel Linux pm01 6.8.12-9-pve and are also having those issues with fully patched PBS
Yes, we have determined as a group the problem is on the PBS (kernel) side, affecting all versions of PVE.

- Would also like to add 6.17.2-2 has problems on the PVE side, we have noticed vm disks halting randomly with 'watchers' being stuck on the ceph side. This happens with live migrations (HA). Downgrading PVE to 6.14.x solves this, that problem also does not seem to occur with 6.17.2-1. Very hesitant to upgrade to to the latest 6.17.x now as it does not look like the problems are actually solved there.