Suburban95, I'm with you. No further comment from here until much more detail is known about the plane(s) we're talking about, and the more detail, the better.

This sure sounds like a dose of PIO (pilot induced oscillation) that can very likely be tamed. With multiple planes AND radios involved, our OP/builder is the only common denominator.....

Therefor a second request for more info on specifics and possibly some pics.