Currently I have a household of room-mates, four in total. Ever since I made this household, I've experienced a bug where one pair - the pair that works late jobs and come home very late at night with low energy - will go to sleep around midnight, but their energy will increase so quickly they will wake up at around 2am every morning with a full energy bar. On the other hand, the other pair of room-mates sleep at a reasonable time of around 10-11pm but I have to force them to wake up at around 9 o'clock since their energy bar hardly increases at all!

Very annoying bug I'm experiencing as the two sims that won't gain energy have to be up early for their jobs and subsequently go to work in a bad mood. If it helps, the pair of sims that have low energy sleep in the Mod Pod Sleeper and the pair of sims that wake early each sleep in a Mod Pod Twin Sleeper - although I don't think that would have anything to do with it since they're both pretty cheap beds with the same energy stat when buying (4).

Hope someone can help!