Snapshot causes VM to become unresponsive.

I am not exactly sure when this problem first started but it used to be fine in the past
I'm running 8.2.4 of Proxmox, and I'm seeing strange behaviour of a VM post Snapshot.

I have an instance of HomeAssistant in a VM that after a snapshot is taken of it becomes very slow/non-responsive.
Stopping and starting the VM returns it to normal working mode

Any logs I can look at to find out what the problem is

I asked on the HomeAssiatnt Forum and some other people have similar issues.