I tried to create an auto furnace in a Realm world, the sort with rails and chest minecart on top, but the minecart stopped moving after reaching the blocks at the edges of the rail, instead of starting to move back to the other direction. After trying to make a circular rail system where the minecart wasn't gaining any speed even though all power rails were powered I tried to look up the possible solutions but couldn't find anything fresh or relevant. I thought it might be a good idea to contact someone who could help out.