HI
I also have this problem - nextcloud in lxc container (not a VM) - with creating a proxmox backup in snapshot mode 90% chances that my nextcloud instance stops working. I also suspect a problem with maria db but I struggle to really find any additional information/logs…
The link above is related to VMs but not container - has anybody find a solution or understands the problem for lxc containers here?
thanks
Jochen