it happens when you lag. If you lag, you can't see the timer. As Bumpers said, the timer is there to force you to end the night. You are not supposed to delay it for no reason. If you happen to be in such situations, you will have to pay the price for it.

You or the site most likely lagged, this does happen from time to time.

You should never hold out on a vote for this reason, likewise the kick timer is only there to continue the game moving, you shouldn't wait until that long to vote. We can't refund games or award wins for this, please vote faster next time to assure this doesn't happen again.