I wanted to drive a train on EN2 but noticed a lot of trains were stuck, so I then realised there was a huge queue for KZ from SG, so I got into the KZ control tower and just found an AI train sitting there doing nothing, and the AI dispatcher wouldn't give it a route for some reason. I then gave it a route to get out of the station, shortly afte another player took over control of KZ, and from that point everything seemingly went fine. It also didn't give a route to the freight train waiting from SG, but I don't know for how long it was there, maybe it just got there as I took control?
From what I can tell the train was actually supposed to be there, as it was listed in the timetable, so I have no idea what caused the AI to act in such a way.
Here is a video of how I found the station and what I did to "fix it"
This happened on the EN2 server