Hi, I have no idea what I'm doing with the save share-y thingie.
My game started doing this this evening, it's done it a few times now in the past few hours. No mods, I cheated a little bit with some friendship bars a few days ago. Pool and house are ground level with no foundation. The ladder is at a bit of a squeeze but they never seem to use it anyway and just hop up the wall. It has occurred to me that I might have left testing cheats on. ((Edit: Double-turned-off the testing cheats just in case and it did it again anyway. And it didn't take as long between, this time. ><))
It's happened to the two teen boys (The others haven't tried swimming.). They jump in and swim just fine by my command and on their own, but randomly when I try to get them to do anything, their actions won't go through the sequence bar and will just hang out in the queue while all swimming actions are grayed out. Even if the action I'm trying to get them to do is swimming to a different spot in the pool or one time peeing in the pool. ((Edit again: This time it was self-inflicted by the autonomy. Bubble of "stretch" (being to get out and do so) popped up and he took a stroke forward and started treading water. I waited for a while, tried to manually get him out, same old, original command grayed out and stuck, other thing stuck in queue.))
I go to manage worlds and back again without saving and it fixes the issue. Saving hasn't been a problem, it's loaded back the time I needed it to.
It doesn't happen every time, I don't know what the difference is. I wasn't actually paying attention to their moods but I think they were energetic ('cos I've got a gem in the vicinity) or maybe scooting in and out of the field of effect? I'll keep poking. It's annoying, though, for sure. I'm kinda relieved that I'm not the only one with this problem.