Wooden waterproof pipe takes liquid from tank but doesn't transfer it to stone waterproof pipe

[Kommunističeskiĭ]

Title: Wooden waterproof pipe takes liquid from tank but doesn't transfer it to stone waterproof pipe

Version: 3.1.3

OS: Linux on server, Windows on client

Java Version: 1.7

Description of Problem:

Title says it all. I have a wooden pipe used to take oil out of a tank and into a refinery. If I attach a redstone engine to it to make it work, it drains the oil from the tank but it does not output the oil into the pipe. The oil simply becomes lost. Here's my setup:

(Yes I know the RS engine is inactive - I took the RS torch out to avoid losing all my oil to this bug.)

I've tried replacing every component but the problem persists. Even after a server restart.

Error Messages:

None.