It does not load or unload anything these days. I did suceed in loading stones ones, but thats it. I have tried with different trains and wagon leangths, but nothing so I need to use robot arms still. If I need a quick and effective unloader now, I need to build it in the old way. I do know it is your first mod and I love it but something has changed in Factorio or it might also conlict with some other mod? I do use the newer Mini trains but also Youki trains and I did also try the original boring trains, nothing.
Often we need to move the stop station a bit backwards to get this loader/unloadser to work abd thats okay, but it does not help now at all.