I've made a simple king of the hill game mode and when the tickets for one team reaches zero the mission ends like normal. However players are then moved back to the role select screen and never booted back to the mission voting screen. We are also able to re-enter the game with 0 tickets left on one side and the map exactly like how it was left.
I was getting around this by ending the mission early, having a trigger go off when either side hit 20 tickets and it giving the other side 5000 sideScore, then having that trigger synced to a end mission module with it set to the side with the largest score to win.
This would work however when you started your next mission as soon as a player got past the briefing screen a the mission would end with a "you're side won" or "you're side lost", and the mission would end and everyone would be sent back to the mission voting screen.