It might be hard to see but the white blip but I circled it in white. I'm not sure if it is working as intended or it is supposed to leave it as a blip. All i know is that it is more confusing then helpful even if the ground is revealed. The red hashed area is true vision I can see with my commander and buildings.
I think it's a bug. If the UI shows the radar has a large vision radius, why not display the unit type.