This might make the fixers mad, but sorry this is needed.
I recommend that FC put a new nano into the general nano kiosk.
This nano is insta cast and will automatically warp you to the mission entrance.
"Black Door Escape"
NA cost : 5
cast: .5s
recharge: .5s
Requirements: 10MC 10T&S
Transports the caster to the entrance room of current mission on both server and client. Must be in that mission to use.
Too bad if it will take risk away from players who will use it whenever they are in trouble with a mob. That is what we need. This bug is making my interest in the game, diminish very quickly.
Sorry but until you can fix this bug, I see no other alternative!