The issue I'm having is that when I colorpick an area I'm painting and reduce the Lightness of the color in the Color panel using the HSL sliders, more than just the L changes. I've watched several times as I've tried to get a darker version of the same green, for example, and although numerically the S value stays the same, visibly the swatch in the corner becomes more saturated as I lower the L value. I can paint with the colorpicked color, lower the L value only, paint next to it, then colorpick the new color (which should only be darker, not more saturated) and the new color now has an Saturation value way higher than what I started with.
Yes I am using the latest version.
Yes I can reproduce it.
No it does not seem to persist in a new document (so far...)
I'm on Windows 10 using a Wacom Intuos CTL-4100.
Affinity HSL help.mp4