I had a system going where my peeps would do a fair amount of work and still be running around like they were hyper all day.
I kept my game open today and their energy bar is near 50% now, at noon. They would only reach that level at around 8pm when I did let my game open. They would never need to nap.

I'll keep the experiment going for a while longer, maybe the bar at 50% it's just a coincidence.

It doesn't ruin the game at all, I was just curious to see if other people had notice the same thing. I started this family before the updates, and I know weird things have happened with those.