What to do when you received this message in Battlefield Hardline, You've been disconnected from this server.
We couldn't keep you connected to this server because you have been idle, or inactive, for too long.
Make sure you leave the game if you're going to be away from your match for an extended period of time.
If you have to step away from your game but are unsure for how long, try becoming a spectator of the match rather than an active player.