Sewers with Range Upgrades sometimes stop working.

How to repruduce:

1. place some Sewers(side by side).
2. add something that removes/stores the Sewage Fluid.
3. spawn some Cows above them.
4. add Range Upgrades to the Sewers.
5. if the Sewers work just retry.

Mod Version: 2.8.1-174
ModPack: Colony - Space

Sewers without Upgrade:

Sewers with Upgrade:

btw: Please update this great Mod to 1.12.2!