Weighing in on this issue.
This happens any time I load a game or switch households. It doesn't happen if I switch control between Sims in the active household.
It's really annoying because very often my Sims will be most of the way through their work day when I've switched and get a bad performance rating for the day as a result of this bug.
Same issue here. Just loaded in after having to save and quit yesterday while half the family was at work. Three sims that should be working are standing outside the house, the two who don't have work today are inside where they last were. Didn't play other families in between. The three who should be working don't even get the button 'send to work' nor realize they should be at work, so that's them playing hooky without wanting to. I wish the 'send to work' button was always there, and not relying on the game's perception, since clearly the game's perception is hugely flawed.
