0.5.19b
When I engage in laboratory modification on a slave who is currently sleeping in the Jail, they are still accessible from the Jail tab. If I reassign their sleeping quarters, they become inaccessible until they have recovered from the modification.
For example, Myrl Saunders is a prisoner, and I apply the surgery "maximize nipples". The slave tab will say "Myrl Saunders will be undergoing modification...." but I can still talk to her if I open the prison tab.