Extreme framerate decrease (memory leak ?)

I’m experimenting, and having traffic set to “real-time online” works fine, no problems moving the mouse cursor onto the flight sim to adjust things, etc. Here is my setting:

If I turn Aviation Traffic to “off”, I have the problem. But, I can get rid of the problem with traffic set to off if I remove ATC in the on-flight screen Custom Toolbar. So it appears that having traffic set to off, and trying to use the ATC in game toolbar, is causing an issue when I try to use the mouse to adjust things in the plane cockpit, etc. I’ll continue to keep real traffic on, or if it is off, turn off the ATC toolbar.

Anyway, a pretty flight underway: