Posts: 3,192
Threads: 196
Joined: Nov 2009
Staff roles: Systems Lead
It probably happened because of an NPC transport getting stuck in the docking animation. Either kill it, bump it or dock on a station and then come back.
I had this problem as well and there were no NPCs in sight. And it also happened a few hours ago so I would think that it fixed itself but apparently not.
Posts: 3,192
Threads: 196
Joined: Nov 2009
Staff roles: Systems Lead
If there were no NPCs or players around it's probably a bug.
However, a player can permanently block the jumpgate if he jumps in and immediately tries to dock on the jumpgate he jumped from. Also, there's a bug that happens when docking on a jumpgate with bad connection, happened to me a few times. If you dock with huge lag, you'll go through the gate but won't go into the animation sequence, your ship will turn around and align with the gate. Then it'll stand still forever untill you f1 because all that time you're in cutscene mode. And another thing only related to jumpholes is when a battleship or such try to dock on a jumphole while the jumphole is exactly in the middle of a ship, the battleship will turn around its axis forever, unable to jump in.