So at first thought people on enemy team were just not accepting, but after close to 15 min in queue, with queue popping and not getting matches, I thought to see if all 10 players were indeed readying up. Turns out all 10 players were readying up but it would not go to map select. Instead it would get stuck and eventually throw us back in queue.
Also we were queuing as a four man.
EDIT- added video of bug
Full Counter is supposed to counter everything, why else is it called FULL Counter... Just like 100 blades should really hit 100 times so you instantly die to retaliation.