There is this small red mark that shows up when you are zoomed out. I think it happens on all variants and liveries, with empty community folder or with custom liveries, but I haven't tested them all obviously. Originally I thought it was an object in the air but it goes away when it's not on the plane itself. It also goes away if you zoom in past a certain point. I think it says something on it but I can't quite tell since it disappears when I zoom in.

 

 

Another clear picture of it.