Speaking of bugs:
I have had this one prisoner in my restroom for what feels like a couple of weeks. I am unable to remove her. If I try to do it from the control panel, the game tries, doesn't play the release animation, and just gives me a small amount of ghost-SPL (which vanishes from my inventory after exiting the panel menu).
If I try to do release her via the prison cell door, the game reloads all the cell-doors as boarded up (as if they were never upgraded) and if I then go to the control panel menu, I get massive amounts of ghost-SPL (like, millions! but it also disappears after exiting the panel menu).
I think I tried to move her to the freezer as well and failed, but I'm not 100% sure. Will re-check soon. Until then, she'll forever occupy one of my cells, uselessly, as her 48 hours of SPL-milking ended days ago... I at least hope my invaders see her as well and try to release her, to no avail.
Edit: Don't know if it's a bug or intended, but if you have a full restroom and release one of the prisoners and then try to capture another on a raid, the game might still tell you that your restroom is full. You might have to exit the restroom menu after the release and reopen it for the game to recognise that you now have an empty spot there. Very annoying.