Image visuals don't change when switching from Selected to Disabled

I have a series of images that need to go from a Selected state to a Disabled state. The images automatically change from Normal to Selected when clicked, but when changed from Selected -> Disabled, the image becomes unclickable while retaining the appearance of the Selected state.

I've tested Selected -> Normal, and Selected -> Hidden, and both of those display as intended.

Any ideas why the visual changes for the Disabled state aren't replacing the visuals for the Selected state?

My current workaround is to create a layer underneath the interactive top layer, then change the image's state from Selected to Hidden, revealing an unclickable gray duplicate of the same image on the layer underneath. The effect will be indistinguishable to the end user, but would love to use the built-in states if possible.

Thanks.