FreeBSD freezes as KVM guest

Even at installation, FreeBSD loves to freeze while installation of src is ongoing. I have tried 10.3, 10.4, 11.0 and 11.1 - it is always the same.

Destination disk is vtbd0 with GPT scheme. Nothing in the logs, no kernel panic on the console.

Any ideas? Could it be an issue with the KVM host?