Once a week or so, I will open up my Director (i.e. map) and it will be blank. II can move my cursor around the screen and press my button but nothing will happen. If I press B to exit the Director (on the Xbox 360), nothing happens. Only way to exit the blank Director is to open my inventory (Start button) and exit, or press the Y button (to invite friends) and exit. I can ask a friend to invite me to his fireteam and I can join him fine. Sometimes, I'll have to ask my friend to take me to the Tower etc when the bug happens. Logging out (to the title screen) and logging back in, does not fix this bug. I have to exit all the way back to the Xbox Dashboard and restart the game for the bug to go away. This is annoying because it takes time, and also I lose my ammo when I go back to the Dashboard. Please fix. I can upload a video of it, if you require.
Bump. Happens to me all the time. I have made a reddit thread addressing this issue and a coulple others: https://www.reddit.com/r/DestinyTheGame/comments/4kshnk/a_couple_of_bugs_that_i_have_noticed/