[Bug]: Unintentional despawns may happen if a player disconnects while driving

[jaj22]

distance has an optimisation where only the effective commander of a vehicle is considered for spawning & despawning. If that unit is deleted during the cycle, sites may despawn and then spawn rapidly, which is unintentional behaviour and may lead to double spawns due to timing issues.

Could be fixed by converting the array of players into positions while in unscheduled. I don't think it's ever an issue except with players (in other cases the driver would be deleted together with the other vehicle occupants).