Apparently A Graphic Problem

[FACTflights]

Any advice please,

I can see aircraft with ADS-B, i.e. with the little globe, in the Interface box, but can not see them on the map.

I then press ESC to get a full screen, and press ESC again to return to normal screen, then I can see all the aircraft that have enabled ADS-B.

Next time I look on the screen, they have disappeared and I have go through the ESC routine again to see them.

I am using Ver 403 in 2D.

Any ideas what may be causing this.