Keith, you are correct!
Looks like you have that lovely starburst as well. Now if you turn your gain up to see better detail on the brush the "snow" will only get worse. Looks like you have a couple of dead zones as well around 10 and 18 feet out that would also still show nothing even when you crank the gain up. Ask me how I know, lol.
Garmin needs to get this fixed!