so i wanted to create a creeper farm in my survival world.it has magma blocks at the bottom so it kills crepees and under it a hopper minecart runs all around and to the unload station.Everything works just the minecart with hopper wont collect anything from magma block...i am on 1.14.4
If a hopper minecart runs over a powered activator rail it stops picking up stuff until it runs over an unpowered aktivator rail.
Look for rails that look like powered rails but without the gold.
Or just replace a rail or two with unpowered activator rails.
It seems that activator rails have to be powered directly, unlike powered rails they don't get powered by adjacent powered rails so I think you could even replace a powered power rail with an activator rail as long as it wasn't the rail that was powering the rest.