I post this issue a Player have on my Server GTNH.

https://github.com/GTNewHorizons/NewHorizons

GTNewHorizons/GT-New-Horizons-Modpack#1140

I put a Drawer with 4 stacks of tiny piles of u-235 on top of a hopper full of 5 stacks of u-238 dust aimed at a compressor and the tiny piles will be accepted in to the hopper despite it being full and it will void all but one stack of the tiny piles.

Using StorageDrawers-1.7.10-1.10.8 in my 1.7.10 Modpack Forge 1614

@jaquadro any idea about this issue?