Hey uhm, did you modify the domain mothership by any chance? Have you tried doing a battle with it if so? Am getting consistent crash on it with the ShieldAlwaysOn and Im wondering if it's a conflict with mods somewhere.
I have done some manual monkey testing and deleting the 19th line of /PMMM/data/hulls/direlict_master_cover.ship - "shield_always_on", - fixes it but possibly causes issues somewhere else.