They place them on the conveyers or atleast they are doing the animation but instead of the items beeing ontop of the conveyor belt and moving along they just get stored in the first conveyer belt block and seem to be invisible or something. Atleast they are not traversing any further.

system

magneticraft is newest dev 2.8.3 (1.12.2)

Fixed, changed some stuff in the sponge config
now it works? Not sure what happened