The newest Casetas are called Diva, and are basically like rockers that are stateless (return to a neutral position after tappdiva, again you can't have a true state-perfect switch, unless it's motorized and to my knowledge nobody makes that.

I like lutron caseta, but I believe those do not fit the bill here. The light on the side may reflect the current light level, but the slider doesn't move. I had some levitron smart lights previously and while I wouldn't recommend them, they had two buttons instead of a physical slider to adjust brightness and avoid the problem altogether.