The Sims 4 Asylum Challenge (Updated Sept 2019)

@MyaRose Thank you for that information. I am watching this in my game saves as well.
My thought is not intentionally assign beds or to worry about them being "claimed" by the non-controlled Sims.
Rather consider it a "first come first served" scenario when the game thinks a bed is assigned to the first Sim to sleep there.
As far as the controlled Sim I would just let them choose where to sleep by clicking on the energy bar to let them "auto-solve" where to sleep.

- EQ #EQCreations