This has happened to me in several occasions: part of the team is wiped out, remaining players take an objective triggering the respawn of the rest of the team.
The problem is in some cases there are enemies in the spawn location. Plus because the player is stuck in a weapon loading animation for a few seconds in some cases I'm facing point blank an enemy and can't do anything but dance around as it mows down the respawn.
Worse: last night 3/4th of the team respawned next to a suicide bomber. I couldn't take the shot (weapon prep animation) and of course he blew up the whole spawn wave.