When it was breaking my macros, I meant that it wasn't showing an icon, just the question mark. I hadn't even been using it, so I don't think it's that. My guess is a syntax error which I couldn't find - in any case, reversing the logic/restructuring the macro as I did made it work so I just went with that.

What I did notice when I was spamming was that sometimes, if I was hitting the key really fast, I'd wind up not casting moon chicken form and just casting a spell.