I was recently creating a MAM, (Make Anything Machine) when I stumbled on a bug where the trains just float mid air spinning in circles. I tried to recreate it in a different spot but no luck. I copy and pasted it somewhere else, still did not work. Only in this spot it worked which is weird. When I try selecting any parts around it, nothing selects. I believe how it works is the locomotive being on the end of a tall track raise which makes the train jump past the station before it can go up and gets stuck mid air.
I have recreated it in this exact spot in a testing save where I make my blueprints. I can provide more information about it if you need.