Wacom tablet doesn't work with Atom's color picker

My Wacom Intuos BT M (v6.3.35-2) doesn’t play nicely with Atom’s color picker. I’m on a MBP (Mojave) with Atom v1.39.1. Clicking on the new color’s Hex or RGB in the picker’s pop-up doesn’t work. Using the touchpad of the MBP does change the color string in Atom. I’ve contacted Wacom but they can’t help me because it’s app (Atom) related … so they say.

Image of Atom’s color picker > https://take.ms/dJlgY