Sims coming home when another sim travels

Recently I've been having an issue with my game, where if one of my sims travels to a different lot whilst my other sims are at work/ school they'll come straight home. This is really annoying as I can't send them back to work/ school so it lowers their progress.  They're not travelling with this sim so I don't understand why they'll be sent home. 

I'm aware this June update has been causing people some issues, so I don't know if it is related to that. I play on my MacBook with the Sims 4 game up to date. If anyone could help me figure out how to fix this, it'll be very much appreciated.