I captured 2 Arthrons and one 1 Siren during a mission.
Started research for both species.
Game has them removed out of my prison. It`s just empty.
ONE of the Arthrons I would understand. Why both??
Before Leviathan captives never got lost in prison, even if used for research.
Same happened for 2 imprisoned Tritons.
This was no issue before Leviathan.