Hey man,
I'm just wondering how to set the game up on a map other than rust.
I was able to sort out a match with invite only on highrise without any dramas, though when I've tried doing quarry a random always seems to steal the host and my lobby migrates to their match already in progress or into their glitched lobby and who ever was the host from my lobby no longer has control over over the 'game setup'.
Also when you say hover over the game mode and does not click it until the game starts, don't you mean not to click the game mode as the game will just start without having to click it i.e. just keep hovering on the preferred game mode (ground war)?
Cheers
Rogr