Don't know if this is potentially an issue specfically with it's compatability with MudBlazor but I've mentioned it in case it is.
SlideUps, SlideDowns, FadeInUp, FadeOutDown etc. just don't do any of the Y related movement.
For the slides it just dissapears at the end of the animation if it's an "Out" animation, otherwise seemingly nothing happens.
For the Fades, it will fade in and out but, no movement.
The X counterparts all work fine, it's just the Y movement.