I’ve been having this problem even in my old corrupted world. I’m trying to set up making Titanium Tetrachloride using Ilmenite and Petroleum Coke Dust. I’m wanting to send both of these materials to the burner mixer, housing them in mass storage units. The problem comes with one of the two not auto…

replace hoppers with brass pipes, replace the pipe between the two hoppers with a LARGE brass pipe, that should help. Oh and set the Mass Storages to Auto-Out ofc