This issue still persists and just happened to me now. Is it not getting fixed? Yesterday I couldn’t follow my two teens to school, they went to school but no away action other than “leave early”. When school was over, they’re back to home but like op said, there’s logo they’re still at school. I quit to manage world, entered the household again but now school schedules completely disappeared from calendar. I didn’t save the game, tried to remove mods, did repair and started with clean folder, nothing changed. Then, I tried again to travel them to somewhere else, it fixed it for a while.
Next day, I can follow them to school and it’s a holiday at the same time, no tasks showed up. I forced one teen to go home at 3pm, but his icon wasn’t turning grey (which indicates they aren’t in the lot anymore). And when I moved my cursor to his icon (there’s an exclamation mark), it’s said he’s in school and there’s an option to “switch to (his name)” but once I did switch to him, I went to home with him! Then same thing happened to the other teen which was still in school. Can’t do anything except an option to switch to her, so I just called her home and her logo showed she’s still at school. Repeated the same thing, travelled them to another lot and it’s back to normal. So frustrating.