Many times while playing I need to go to the bathroom or grab a sndwhich, but the only way I can stop is by logging out and when I do that I lose the place I was in a mission.Sometimes I must restart the mission over which is irritating to say the least.So is there a pause key for the game?
What you can do is if you just need to grab a sandwhich or something is when you are at a safe spot just go. Mobs dont respawn. Once you clear an area just stay at the back of it and do what you got to do. Just dont take more then 14 minutes or you will auto log out.
I often find the easiest way is to go to the bridge on your ship. That way the random encounters won't bother you while you are gone.
No pause in a mission though. So if you feel hungry nab the sandwich before the mission or after. Otherwise just redo the mission like you have been. :p