Hi,
I don't think that your problem is related to quorum or cluster state.
The problem is that pvestatd is hanging somewhere.
pvestatd read stats from the host, then the vms, then storages sequentially.
They are some timeout implemented for storage (ping check, nfs stats checks,...) to try to detect offline storage and bypass it.
Sometime, timeout don't work and pvestatd hang on this storage check.
That's why no more infos are displayed on the gui.
So the question is, do you use your storage where the quorum disk is down, for other thing (vm storage, backup storage,....)
also check
cat /var/log/daemon.log|grep pvestatd
maybe you'll have some logs
I do use some storage on the machine which provides the quorum for some simple backups. This is happening on clusters with and without storage located on the device providing a quorum disk. This was also dietmer's thoughts, I provided output showing that it didn't seem like it was hanging while the quorum disk machine was down. I am stumped at this point, but there is no doubt the cluster itself is 100% working as expected.