P: Cannot set vector layer fill color from custom color picker

We are developing a Color Picker plugin for Photoshop. It works as expected and we can set the color from any entry point, apart from ONE!

If you double-click a vector layer to set its color, it is not set.

Step-by-step instructions:

1. Change color picker to a custom PS color picker plugin
2. Create a vector layer
3. Double-click the layer to set the color. It launches the color picker.
4. Select a color, click ok.
5. Color is not set.

As mentioned, it works in all other places (foreground color, background color, text color, overlays, in other plugins etc). It also works for vector layers, but only if you change the fill color from the top toolbar and not by double clicking.

It works with native OSX color pickers, but not when using a PS color picker.

We are using the latest version of Adobe Photoshop CC on the latest version of OSX.