Confirmed it happening with Chemical Plants, Assembling machine 2s, and Oil Refineries.
Was just able to get it right by pasting the recipe twice rapidly.
If I switched between two unbarreling recipes in an assembling machine, the machine would lag behind the paste (paste unbarrel oil over water, pipe still says water. try to paste unbarrel water back over, the pipe now wants oil. paste water again, it wants water)
Steps to reproduce:
- Set different recipes on 2 Fluidbox crafters
- Shift+RightClick one
- Shift+LeftClick other
- Pipes will insit older recipe fluids are required, even if broken/placed