There's a 20kt raider ship obnoxiously jumping back and forth through one of their invisible gates I discovered.
If you board it with marines, you get the usual notification about not having breached the armor, breaching charge being prepared etc. When the ship jumps and reappears, the marines will be gone, as if the ship was deleted and recreated rather than jumping.
Is this a mechanic to stop the player from raiding the raider home system? Or is it a bug I should report?