'Use Skin Scattering' and other functions broken in Unity 2019

Checking the box to use skin scattering, or attempting to disable specular highlights and glossy reflections no longer work in Unity 2019. Unsure if other functions are defunct as well.

Here's a screenshot of the 'SSS Demo' material unmodified in Unity 2018:

And the same material unmodified in Unity 2019:

Skin scattering, although enabled, isn't working as it did in Unity 2018, if at all.