1) when my sims are changing levels or using stairs at any time the camera must be on the same level or they’ll just stand at the top or the bottom of the stairs. This can get really frustrating with larger households, as no one can autonomously do anything without me constantly checking that they made it up/down the stairs. It took me forever to figure out why it took so long for my sims to do things, and then I realized they were standing by the stairs all day!
I've been experiencing this too and I thought I was losing it. Like, my Sim will finish what they're doing and, because I don't have anything else queued up for them, start walking upstairs to get a glass of water from the bathroom sink. (Yes, my Sims are still absolutely obsessed with water. But that's a whole different thing.) I'll cancel the action while he's on the stairs and tell him come back and do something on the main floor instead. 10-15 game minutes later, he's still upstairs so I go up a level to see what's taking him so long and find that he's right at the top of the stairs about to come down.
Once would be just good timing, but this happens over and over again. Sims will take longer than I expect to come down after doing something upstairs, and every time I go to check on them, they're right at the top of the stairs and about to take their first step on the way down.
It's impossible to tell what they're doing up there because, as soon as the camera can 'see' them, they do what I expect them to do. But I'm guessing they get to the top of the first step and then just freeze. (If I pause the game, they're frozen mid-step, not standing still with arms out or at their sides like they'd been reset.) It's super weird. I guess I'll be playing on one-level houses for a while.
