Electromagnetic plant bug?

[Squirting Elephant]

Recipe: Electromagnetic science pack

The electrolyte input pipe works fine but when I connect a holmium solution to the other end, and the holmium pipe network empties for even a split moment, then the Electromagnetic plant starts pumping out electrolyte out of its holmium input?

I worked around it by adding a pump DIRECTLY to each Electromagnetic plant holmium inputs.

https://imgur.com/a/bhSvYt3
https://imgur.com/CAEU3zT

Connecting the pump directly to it prevents the problem.

UPDATE:
Solution: Rebuild the entire electromagnetic plant after rotating or changing recipes that would change its internal pipes. It can be prevented by not connecting any liquid to the plant when rotating/changing recipe.

[BlueRock]

This might be related to a bug that was reported in the official Factorio foums https://forums.factorio.com/118688 if that is it, then it was resolved in the latest experimental release 2.0.14. To get the experimental release you can opt into expermental releases on the steam factorio page or version 2.0.14 will likely become a stable version soon if it isn't found to break anything new.

[Squirting Elephant]

That bug looks related yes but we will see.

Originally posted by ViolentSweed:

You don't need pumps anymore, unless you're running really long pipelines.

You’ll need them for long pipes, and I also use them to prevent back-flow. If an issue like this occurs, your entire network could end up with the wrong fluid. However, placing a pump before branching off your main pipe network stops the wrong liquid from flowing back if the pipe network is empty, especially after rotating a plant.

[Warlord]

I found a bug that seems to be related to this today. I was building Quantum Processors on Aquilo when I decided to check to see whether productivity modules increased the hot Fluoroketone output. I wanted to measure the amount generated against the recipe's amount. However, after I removed the pipe, the hot liquid would vanish from the machine after each recipe. I could not locate where the liquid was going, and was afraid that the liquid was being voided, so I didn't leave it up for more than 5 cycles.

Since EM plants often need to be rotated and flipped, I bet there are some hijinks related to moving around the input pipes. Perhaps a phantom output/input pipe that doesn't reflect where the pipes claim to be any more.

[Voxera]

Originally posted by Warlord:

I found a bug that seems to be related to this today. I was building Quantum Processors on Aquilo when I decided to check to see whether productivity modules increased the hot Fluoroketone output. I wanted to measure the amount generated against the recipe's amount. However, after I removed the pipe, the hot liquid would vanish from the machine after each recipe. I could not locate where the liquid was going, and was afraid that the liquid was being voided, so I didn't leave it up for more than 5 cycles.

Since EM plants often need to be rotated and flipped, I bet there are some hijinks related to moving around the input pipes. Perhaps a phantom output/input pipe that doesn't reflect where the pipes claim to be any more.

I had a similar experience just now, copied and pasted a plant for quantum processors and started it, then I noticed that the output of hot flouroketon was not completed due to missing undergrounds, but the plant was still working.

Checking it I see the flouroketon getting created in the output slot and then drained, but there is still no output pipe.

Deleted the ghost image, no change.

But after a few minutes the plant stops and suddenly there is 20 flourekton in the output.

So it looks like the draining is the bug, it still builds up invisibly until full.

Once I added the underground pipes it drains for real and starts working.

Removed the underground again and the machine keeps working seemingly draining the liquid.

Second time though it suddenly started building up after almost 1½ minute adding around 4 per batch and stopping with 39 in the ouput.

So there is some strange thing going on with it :)