Macro's are only activated if you press the macro button twice.

It seems like I made a derp, macro's are executed on tick and if you release the button before the tick occurs then the macro will be removed from the "to run" list before it can run.

This is still a problem in 2.0.3. (MC 1.12.2)

In case there is a conflict, I added your mod to the Enigmatica 2: Expert Modpack on Twitch.