In this case shouldn't clicking on the pipe show that there is also oil in the pipeline?

I noticed my uranium mining was not producing any uranium, and although all miners were connected to sulfuric acid they were not mining due to insufficient liquid.

There was acid in the tank, and the pipeline only had acid in it.

In an attempt to self debug I added a pump to the acid pipeline ...

I am seeing the same behavior where I have a bunch of stations with the same name, some disabled, and the interrupt chooses disabled stations as a destination