Actually i just built it in a creative and it works so it might just be in survival with a dropper elevator as that's what's I've been using on my survival world
I download the save and tested it and it works but then rebuilt in on my xbox one bedrock edition world and it doesnt work as all the filter blocks get drained out aswell as the other blocks through the hopper
Actually i just built it in a creative and it works so it might just be in survival with a dropper elevator as that's what's I've been using on my survival world