Color picker window is not opening for standard shader

Steps to Repro:
1. Create a new project
2. Project window > right click
3. Material
4. Select material and try to edit "Albedo" property's color

Workaround : Select Albedo, press Tab until you reach the color picker and press space.

Actual Result:
1. Color picker window is not opening for standard shader
2. Thr dropper icon is overlapping the color patch

Environment:
Windows and Mac

Occurring with:
2018.3.0a5, 2018.3.0a4

Working with:
2018.3.0a3, 2018.2.0f2