Combustion Energy

[Rosexephon]

Hi, so i hooked up 4 combustion engines to pump into wooden conductive pipes as seen in the image below on a server I own.

I turn it on and it doesn't make the connection nor produce the aqua blue energy link

Now I went on single player and it does work, built it the same way same power exact copy

I can use energy links and conductive pipes with engine generators fine but this seems buggy?