Zeta Fx-79

Hi all

First flight with Zeta FX-79. Plane has pixhawk, GPS + compass, airspeed sensor, telemetry 915 mhz.
I was prepared to do the autotune.
So, In flight start a message ERROR COMPASS VARIANCE, who disappeared.
But after 30 seconds flight, start de failsafe and RTL. Got plane in manual again, and it seems that the radio was losing the link with the plane. Distance to mav was 100 meters,
So really need some help because I have no idea what happen


Log and paramet atached
Link bin onedrive.live.com/redir?resid=4 … file%2cBIN