A fix for Alt-f4 exploiters
A simple fix to a major problem is when the game closes suddenly, either force closed or actual disconnect from a crash or power loss, is when the player logs back in they automatically reconnect to the last map they were on, IF they were raiding. Now to make sure that people don't come back after a long period of time and find themselves on a random map, there could be an internal timer of between 10-30 minutes before the game forgets what map you were on. A last thing would be after that time frame, the game would count that as a loss for the raider, and give the builder the points from the attempted raid.
This simple fix would do 2 very important things. 1- This would prevent exploiters from leaving maps without having to take an actual loss. Even if the last part wasn't added, they would still lose play time and be punished for trying to exploit. 2- This would allow people who do actually get disconnected for various reasons the ability to get back in and try to beat the map they lost connection to.