Text reveal on autoplaying slider

I want to do a text reveal (from the top) animation when each slide shows up. I currently have the slider as autoplay. Only the first slide successfuly animates and not the other 3 behind it. I have the animation applied to each slide as a slider interaction but as the slides play through (or even when click one of the later 3 slides) the animation doesnt work. What is happening and how can I fix this?