Empire units placed in an Empire Prison in the map editor don't become imprisoned after capturing it
I consider doing such a thing a map design error, because it makes no sense for the Empire to do that to its fighters, it should be disallowed. There are two parts of the bug:
- Such units are never made prisoners by the game, as indicated by their activities such as "Going to Lair".
- Hence, after converting such a Prison they do not become your prisoners. You can harm them with Thunderbolt, for example, but their corpse/unconscious body will not appear outside of the prison. Your units will not consider them valid targets for attack though.
I recently testet that one. Empire Units in an empire prison behave as normal prisoners after capturing the prison, so I cant reproduce the issue. (including beeing able to be picked up, get attacked by minions if freed, the "imprisoned" activity and beeing able to be converted)
Im not sure if you played the campaign, but the Empire is a place of hipocrisy and a powerful cult of kira, wich is quite fundamentalistic, so i dont see any issues in empire imprisoning empire units as heretics.