How do I animate a UV Tile discard with Poiyomi?

I’m trying to use UV Tile discard on my avatar with the Poiyomi shader to toggle different parts of the outfit on and off through an animation but everytime I go to animate them, they don’t actually get recorded as keyframes and nothing happens. What am I doing wrong? Can someone help? Thanks!

Animate material properties from a mesh renderer that uses the material, if you select a material directly then changes to properties will not be recorded.