I've seen a couple of mentions of this issue in other threads, but I haven't seen any response to those posts or a thread dedicated to this, so:
Frozen likes to teleport my officers back to the barricade when I get to Obisek's room. I can go back and retrieve them before I start fighting, but they're unable to come to me because they get stuck trying to run through a wall. This can be worked around (going back and retrieving them before you actually enter the room, since it seems to only do it once, or dying and respawning) but it seems like a thing that shouldn't be happening at all.
Has anyone else seen this happen, and does anyone have a reliable way to avoid it?
I had officers actually disappear after the cinematic where Obisek gives you the option to join him. I even placed my BOs in a circle around him in case I was going to fight him.
I played the mission 4 times with 4 different captains (all Federation) and on two the the times, all of my officers were present. On one of the times, one officer disappeared, one time two of my officers disappeared.
I was still able to complete the mission but it was a bit harder being short-staffed.