Happened 3 times now
In the staroflife buildings, in the end room where there are two bench seats and some lockers. Walking around the seats the game starts to glitch and you fall through the floor into under the map.
Once I was respawned as a fresh player, the other two time I exited server and was back in the room when I rejoined.
Usually holding a rifle. Wonder if it’s to do with the items that spawn under those benches