Sometimes (very often) I'd restarted my Server all my Ultimate Energy Cables and pipes disconntects from the Quantum Entangleporter. Then the only way to fix them is to use a new Channel. I'd tried to place the cabel new, switch the inputs,replace the Porter itself nothing worked.

I'm using only public Channel and yes also on different dimensions.

That's what's causing the disconnect for me sadly.

had the same problem. I think they're working on it. Are you using the private channel and all the quantum entanglopers are in the overworld?

Indeed. Integration is likely the issue.

Just as a heads up, if you are using any mods that adds Mekanism integration (especially with gas transport) make sure that they are all updated. There are a few mods specifically that I have found needs to be updated and/or have their integration disabled. See this post for more information...