By default, when you drag the Slider, it moves relative to your cursor or finger from where you started. This allows you more granular control on touch screens, but if you prefer the Slider to snap to your cursor or finger, enable the Snap to Pointer setting.
The documentation doesn’t mention what happens when you click the slider. Actually, I don’t expect any reaction at all as long as “Snap to Pointer” is disabled.
You could perhaps use this behavior as a button function, but that would be optional and would likely require you to add a new feature.
Am I understanding this behavior correctly, or is this a bug?