These two screenshots will hopefully show what's going on. Looks like the crucibles take in rather too much cobble when being fed in some automated way.

Thermal Dynamics itemducts and Mekanism logistical transporters both do the same thing to a lesser degree.

Running 0.1.3 here, just updated earlier this morning.

also this happens only when transfer pipe is using here, because on crucibles all kinds( wooden crucible, wooden barrel, stone barrel) actually it place all 64 blocks, not at once but rapidly, so 16000 mB is the highest number that can go

same here but i got flying cobblestone

alright, fixed it by adding a stack limit