[Open] Levelling up account while at a party and not getting extra energy

Having the same problem. It was almost my bedtime but I have found that my level XP bar is near the end, so I decided to eat a party cake to boost my energy and earn some more XP. It turned out that I leveled up but my energy bars of any of my sims were not filled up. I should have gone to bed earlier and just forgot about the level XP bar.