I've even ran into this a few times on the BAF trial. When it's time to get one of the AVs people just sat there for like ten seconds, nobody moving or saying anything, so I did it with my Blaster or Dom. One of the times we had one Tank that was new to the trial and no Brutes, so I understood. The other time we had multiple of each, so it seemed odd to me. I died each time lol. But the second time it was right after a successful pull, so it worked out.