Are we taling here about SP or MP? I'm sure I normally used this JH yesterday and it worked (MP). In MP when server is crashing, you cannot jump to other system, could be this to be also this case? Other jumps works?
This sutck in base is unpleasant situation, but you can use help from other player or wait little prior NPC will dock there (happens frequently). Info about Nansei was added to Bugtracker (5th base with such issue).