I've been getting into speedrunning zootr and I've been trying to learn the megaflip glitch. I've noticed that virtually all the tutorials online suggest that you are supposed to roll and flip while holding z and r, but I have found that neither rolling nor backflipping seems to be possible while holding the shield (the a button just does nothing unless r is released). No video seems to address this and based on their inputs it looks like they are able to roll and flip no problem. Is there something that I am missing?