Pretty sure I am. Unless you updated it within the past couple of days. I can use a Wheel loader to fill them without issue but when I use a convayor belt It carries the stone up the belt but doesn't dump the stone into the rail car.
Hmm that is interesting.. I have seen people on YT fill them with a conveyor belt exactly as you described with no issues.. What coal car and conveyor belt are you using? I will try and investigate and fix this issue!