probably not passenger suicidal tendencies or way point frustrations. when a passengers 20 minute trip time expires, they abort their travel plans. possible causes of exceeding the 20 minute travel limit are stuff like a long wait time to board your train or a train delay along it’s route. could of even been a longer than expected wait to board the bus/tram before he reached his train departure station. not really a bug, it’s a travel time limit issue.