When you know you are going to be away, it would be nice to be able to go somewhere, even if it's just a room that's like the OOC lounge. Your character is literally Out of Sector. It's kind of silly that you sleep in one spot for a few weeks without moving.
I would envision it that you have to enter a note to get into the room, which would be an explanation of where you are going and for how long. It would do a couple of things. GMs could reassure players who worry about their in game friends vanishing that they are indeed out of sector and should be returning... and also stop the RP disconnect of having someone sleep for multiple weeks.
It would be a pretty easy fix and a QOL thing for players and I'd think GMs to know if someone has quit, or is just romping around having fun IRL.