Not sure if anyone else has experienced this, but this happened to me today on numerous occasions.
Seems like duos are extracting or heading to the next zone without waiting for the last member.
As an example, I had a group leave me behind for no reason whatsoever.
I had asked to search for ammo, and got the go ahead, they waited until I was on the other side of the map, and then they started the count-down to go ahead to the next map.
I had no time to get to the room before my character went MIA, This is happening a lot on the higher level areas and has to be addressed.
Time has to be increased to prevent trolling like this. I understand that we can't wait for someone, but the game requires you to get ammo, tech and so forth. People see the potential to abuse this by trolling others, because it's not them that lose a character, or time, or exp.
Please increase the count-down timer.