It happened to me a lot and not only at the scene, the way i got around it all was to relaunch the game and save as offen as I could and just repeated that process
Yeah it happened again when i went into the principals office. The thing that worked for me is to go into annas room at 23:00 so that i dont go into my room after 00:00. Somehow the game almost always breaks when i go inside that late.
