I sympathise with you, logging out thinking it might solve a problem and not being able to get back is a hard hitter,Yes, it's doing the exact same thing to me. I logged out to see if that corrected it but now I can't connect at all.
As a few have said it seems to be a line of sight problem, solved most times by raising above the system plane, it can be annoying but if you need/want the scan that's an alternative, I personally am so disillusioned with exploration at the moment I just say 'sod it' and leave... but that's another story and thread.