That's docker problem versus apparmor, not PVE related. Debian 12 didn't have active apparmor, but debian 13 has it by default. I encountered the same problem with giltab-runner + docker. Profile docker-default is created by docker service on the...
I have SAN with 3 luns connected with multiple destination's paths by multipath without problem. But i used mainly cli for configuration at the end, not gui. Looking on your debug, i think problem is somewhere
1] acl on SAN
2] iscsi/multipath...
Was it resolved?
I got the same problem, finally upgraded one of the Dell 740XD from pve 7 to pve 8 (Linux pve-18 6.8.12-13-pve #1 SMP PREEMPT_DYNAMIC PMX 6.8.12-13 (2025-07-22T10:00Z) x86_64 GNU/Linux) and every reboot:
Screen lost. Server...