Color Picker Changing Entire Stroke From Gradient to Color

[CalebatCStaffing]

When I use the Color Picker inside of the Gradient window, it works fine and normal on shapes, but if I try to use the Color Picker when adjusting the gradient of a stroke on a shape, it switches my gradient to a solid color. I'll attach a video to show what's happening.

In the video, the first thing I do is select the shape with the stroke on it. Then I make sure that I'm adjusting the stroke gradient and not the shape gradient. After that, I move over to the Gradient window. I click on the Color Picker and then click on a color from my library. You will notice that the stroke is now a solid color instead of a gradient.

I do two things to test if this is an issue with selecting colors from my library. The first thing I do in my screen recording is use the Color Picker on a color located inside my Illustrator canvas. You can see that the Color Picker worked. The second thing I do to test if it's a library issue is to use the Color Picker on the shape rather than the shape's stroke. This works. I'm able to use the Color Picker to select a color from my library without it changing my shape to a solid color. 

Is anyone else able to replicate this issue or am I the only one? Or am I just flat-out missing something?

[Kurt Gold]

Your description is correct.

You will first have to add the library swatch to the regular document swatch panel and then use the colour picker and Alt (key) click on that swatch to only change the colour of a single gradient colour stop.

[CalebatCStaffing]

So picking a color from the library works in every case except for when picking colors for a stroke inside the Gradient window?