@Bismarck Status update: No incident in 9 days (incident occurred 4 days after last post). Changes since:
Guest (pfSense VM):
Removed custom IP block lists; bogons re-enabled. Disabled "hn ALTQ support" (all offloading disabled). Uninstalled unused WireGuard and Syslogd-NG packages (Syslogd-NG was failing to start).Host:
Disabled RSC on interfaces/setSwitch. Disabled VMQ on all vNics.Result: pfSense VM now runs very stable and reliably.
If you ask me, my best guess is disabling "hn ALTQ support" and / or the RSC/VMQ did the trick.