To be honest, I probably placed that blueprint before I even researched Automation 2, to reserve the space on my production line.

So it might be that if you place an AM2 blueprint requiring liquids when you only have access to AM1 assembly machines, it creates the ghost in an invalid state because ...

I'm getting this bug in [0.17.39] today, also. Trying to set an Assembly Machine Mk2 to create blue circuits.

If you open the save you'll be standing next to one of the machines with the problem. Just click on it and attempt to set the recipe to processors.