[1.12.2] Water Mill not allowing to output items after world restart

[xJon]

(Originally reported over xJon/Tekkit-SMP#20)
In a setup like this:

After a world restart, the one on the left will keep items moving, but the water mill cannot have items pumped out of it anymore, requiring to break and re-place it.

[Speiger]

LOL, yeah will be addressed next patch.