Crucially, the craft cycle has not finished yet (it's at 100%), because the fluid output is full.
Once the output slot/fluidbox is empty enough, recipe's Ammonia is output there, Ice as well, and recipe change to Lubricant is initiated

That tracks. Without knowing the underlying intentions, it ...

I have stepped through this tick-by-tick, and it looks like it is working exactly correctly to me.

1) The Chemical Plant is blocked from Switching Recipes because of "Output Full".
2) The Pump activates, removing some fluid from the Output buffer
3) Chemical Plant is no longer Blocked; Recipe ...

What did I do?: Loaded mods were Space age, quality, elevated rails and base mod.

Attempted to change the recipe of a chemical plant when its outputs were full via circuits. I waited for the machine to fill up before activating the constant combinator that would have set a new fluid recipe ...

Would like to see this implemented. Offhand, here is a list of recipes which the ingredients are shared 1:1.

Inserters, Assemblers, Mining Drills = Iron plates, Gears, and Greens
All level 1 modules = Greens and Reds
Active, Passive, Storage, Buffer, and Requester chests = Reds, Greens, and ...

What did I do? : Loaded mods were Space age, quality, elevated rails and base mod.

I was on the space platform and routed to the edge of the solar system. Got the victory screen. Proceeded to immediately make a temporary stop at the shattered planet. As the platform started traveling, I created a ...

"Inverted Diamond", "Inside Roundabout" ("In-and-about?" Not 100% on the name yet)
08-25-2024, 20-58-58.png

North-South is RHT, East-West is LHT (Trains can enter from the North-West and South-East, Trains leave from the South-West and North-East)
0eNqdmstu4zYUhl+F0FoORIoiRS ...