Dynon HDX (wifi) ADS-B disconnects from EFB after takeoff

[swamif16rv7]

I just added a second HDX w/wifi and now my FlyQ EFB disconnects from the dynon shortly after takeoff. The EFB connects and displays correclty on the ground, but shows disconnected shortly after takeoff. The iPad status page says the Dynon is still connected via wi-fi but the FlyQ says ADS-B disconnected.

Any ideas why it works on the ground but not in the air?