So I've been having an issue with Quark lately.
Basically, most of the time, Quark will lock Smooth Lighting to off and won't let me change it.
I can kind of change it, but it won't let me go to maximum, and when I change it to minimum, it sets it back to off.
Is this fixed? Is there a way to fix this? I'm confused.

Specifically on the 1.12.2 version.

This only happens if you have the experimental colored lighting feature on.