Was playing Jefferson Plaza and got to the boss at the end (where you come back outside). I run up to the truck under the awening on the left as you come out the door, climb up on top of the cab and go to cover there behind the truck's rear (giving me higher elevation). I start to take hits and then get one shot from a guy to the right past the rest of my group I wasn't even shooting at. fine up to now, and I thought I'd crawl back to my group for the rez.
Here's where the bug happens. I'm suddenly no longer on the truck, but UNDER it, unable to crawl out, with my group unable to get me a rez. Bit hard to be transported under the playable world. Couldn't even explain to thegroup what happened as chat was disabled by then.
Luckily when they finished the mission, it reapawned me at the start of the area, but still, not very nice