I've been running OpenBSD 7.5 amd64 in VM under Proxmox 8.2.2 for several months. A couple of times each month; there is no response to keystrokes on console and no response to http and ssh access. When this happens; the system does respond to pings. I move on by forcing a hard reboot. If I am unable to login into the system when the issue occurs; how might I diagnose/resolve this issue?