There is a MAJOR BUG in Alpha 4.0, which is, there is a limit of how many resources you can have. I have been mining the dark purple ore (idk what it is) after I build my base with a big network flow (managed to use 9 inputs to the base transformed in 18 inputs - I split 3 lanes into 1 - and the damn thing clogged at the cube base where your mined items goes! This makes my 3 lane to 1 thing not working and the clogging is a mess! Looking at resources it seems the dark purple ore (have not tested any other ore) is capped at max of 2.0K and will NOT enter any more in the cube base unless you consume it and it will fill to the 2.0K again.