There is a bug that if a button make a big delay, if someone pressed it before round start and it's doesn't triggered before the next round start, it will be triggered in another round.
For example, player A pressed a button which with delay 50s before trigger a huge trigger_hurt to kill all players, and a new round started immediately. After the round start, the huge trigger_hurt killed all player because someone pressed the button and it is not triggered before the new round start.