It doesn't occur on all multi core systems and depends on the system topology. I'm using a Intel Core i7-9700E (8 cores not Hyperthreading).
Add following lines to `/boot/devices.hints`:
```
hint.lapic.0.disabled=0
hint.lapic.1.disabled=0
hint.lapic.2.disabled=0
hint.lapic.3.disabled=0
hint.lapic.4.disabled=1
hint.lapic.5.disabled=1
hint.lapic.6.disabled=1
hint.lapic.7.disabled=1
```
When rebooting the system, it will end up in a boot loop because FreeBSD panics at boot. This patch fixes the behaviour.