Love the VATSIM online feature and use it ALL the time. I have noticed that whenever a VATSIM acft gets to about 45nm of me it simply disappears on the Navigraph APP (W64). It then re-appears out the other side.
What I expected to happen.
To see VATSIM connections regardless of range from me.
What actually happened
When VATSIM acft get to about 45NM away from my position they disappear off map.
So within 45nm they are hidden, outside of 45nm they are visible. So if they cross my path, they disappear and then re-appear. Nothing inside of about 45nm.