Automatic trains decide to randomly leave its current station while the the leave condition is not fulfilled. It does not advance the schedule and simply tries to loop back to the station it just left.
See https://i.imgur.com/vCuVbsN.mp4
Save available at https://www.dropbox.com/s/uk1ppqyvo2aps ... 2.zip?dl=0 (Sorry about the file size). The bug happens at the 3rd copper outpost way up north a couple of seconds after the save loads.
[kovarex] [0.17.4] Train randomly departs station
Re: [0.17] Train randomly departs station
There are 10 types of people: those who get this joke and those who don't.