Yesterday after doing a run through the Munitions factory and the twins boss fight, myself and my group received no tokens for winning the fight. Today, this happened again doing a Snarbolax fight just a few minutes ago to not just myself, but my group as well.
I have checked and the tokens did not suddenly appear in my inventory as some sort of delayed glitch, so I can only assume the twins fight and snarbolax were just a waste of time. I'm not too bothered by that, but it's something you should look into as it may make alot of players angry if it happens to them.
You did pick it up, didn't you?
That huge-ass token needs to be picked up at least by one of the players. If you just run off for the rewards, you get no token (too greedy). Its not a bug, its a "feature".