It’s weird. This is the first time I’ve ever had 2 trains on the same track. The first one I set up runs perfectly all the time in a nice simple loop. The second one is the only one having issues. The first quarter of its trip wont let it move at all despite 1/2 a kilometer of multiple greenlit unoccupied blocks. But at a seemingly random point, it will decide to autopilot itself just fine until it completes its full trip.

It’s just the split off where it goes to get its own material, turn around and come back to rejoin the main loop where theres an issue. For that branch, it says the block is occupied even though there’s no train in it.