I had this happen at Behemoth (we all wiped because someone accidentally auto-ran into the boss and we couldn't recover. When we got back he was still attacking absolutely nothing with the bombs appearing to destroy towers). The second time it happened (back to back CTs I have no luck today) at Atomos where for whatever reason, even if all 8 people were on the Blue Button, it would not light up. @_@

Never had it happen before today but wow was that annoying.