Occasional Ghost-like Ship Artifacts in the DScan Bubble?

Though you wrote they show up regardless if you get any results, though maybe you scan in less than 360 degrees so no results in d-scan window but at 360 degrees there are ships and those are showing up as “ghost ships”? Thus those ships are all the ships within the entire d-scan bubble and the d-scan window shows only the ones inside the cone. At least that’s my best guess.