I am using version nae2-1.6.1
The problem arises with recipes where there is more than 1 type of item at the input. I tested using the example of a bronze ingot, which is created from 3 copper and 1 tin in the Thermalexpansion induction smelter. For the convenience of tracking, you can enable blocking mode in the ME Interface.

The bottom line is this, I install 4 induction smelters and connect p2p to them. When ordering a recipe, I get the result that 3 copper ingots get into the first foundry, 1 tin ingot gets into the second foundry, which is why the recipe does not start and everything breaks. As a result, I get leftover items in the mechanisms and unfinished auto craft.

This is definitely not what should be happening since resources get sent to tunnels in a package that can't be split. I will investigate.

Does this happen with just the Thermal machines in your case?

Actually, are you certain you're using ME Interface tunnels and not Item tunnels?

Actually, are you certain you're using ME Interface tunnels and not Item tunnels?

Oh, I'm sorry, apparently when I was comparing p2p with each other, I actually got this error with the tunnel of items.
After checking with the p2p ME Interface, everything began to work normally, I apologize again :(