host down

Hey there, I'm new to this proxmox. For a few months, my proxmox host goes down unexpectedly due to backups. After a manual restart, it comes back online. Initially thought that the issue was in BIOS. I did a few things, like updating BIOS, even though I get the same. Do you have any idea on...

Hello I have an cluster with 4 servers, 3 with 1 VM on each and no one on the last server. I configure the replcation of each VM on the empty last server each 30 mn. At 21h today, I review the state of all of them and see that one have already the task at 05h30... the other, correctly have done...