Hi @Armel_08 ! I wrote a reply yesterday but I think the forum may have discarded it. I don't believe this is a glitch, as the wires are fairly finnicky. If you are unsuccessful drawing a wire to a new machine, the wire and any wire connected to it will fail. We will look into making it harder to for this to happen! Also, you can send a screenshot to firstname.lastname@example.org and I will take a look at it to be sure!