Open Space mode has docking points for the stations. If you block those with a large enough ship or object, you can’t dock any longer. Same goes for the Warp-gates.
Ships that can be used for this tactic: Destroyers or objects like Waz’Got battle station.
To fix this issue, every ship or object that is on that docking point should get automatically moved out of the way. Objects should self-destruct at docking points as well.
This should happen after 30 seconds. Objects that are linked to the ship, should self-destruct after 30 seconds as well.
Video: This bug can be replicated for Leviathan, Jericho, Federation and Empire docking point. However, Empire has two docking points, so it’s the only station where this issue can be avoided.