When you put down a machine making electrolyte solution, and disconnect its holmium input, it'll pull holmium solution out of thin air to continue making electrolyte. Placing down another machine that accepts holmium solution as input, or placing two pipes at the holmium input ( 1 pipe does nothing), will make the EM plant spend the solution for crafting, as it's supposed to.
I recorded a short video demonstrating the bug: https://youtu.be/iqRE1Mu7FLg
