You can just put first part of your domain and ip into /etc/hosts file.
It's hardly. This technique used in many other parts of proxmox software. So, complex code refactoring and essential architecture changes need to fix it. I think it is basic flaw in software architecture. I doubt that...
Hi dudes. It is because pmxcfs cannot resolve ip-address of your host.
Go to https://github.com/proxmox/pve-cluster/blob/master/data/src/pmxcfs.c and you can see it on line 803.
Pmxcfs improperly precess hostname specified in /etc/hostname. It resolves only only first part of your hostname...