System Information
Operating system: Windows 10
Graphics card: GTX 950M

Blender Version
Broken:
Blender 2.80
Branch: Master
Commit date: 2019-01-14
Hash: 84c06e996a7a

Short description of error

Object viewport display color will revert back to the default white after using the color picker, and immediately adding a second object with a non-default property. (E.g. changing the initial origin, rings/segments of a UV Sphere.)

Exact steps for others to reproduce the error
Select the default cube.
Go to the Material tab in the Properties Editor.
Under the Viewport Display menu, use the color-picker to change the color to anything other than default.
Add any object (e.g. a Torus) to the scene.
Change any property in the New-Object pop-up menu in the lower left of the 3D View. (I'm sorry, I don't remember what this menu is called.)
The default cube will revert back to the original white color.

(This error does not occur if any other property is changed between using the color picker, and adding the second object. Nor will it occur of the color picker is not used.)