We are updating our Stratux/FlightBox software and will do some additional testing.  Initially, I'm getting sporadic results with the new stratux build.  
Android to Android worked 1 out of 3 times, Android to Apple worked 1 out of 3 times and did not see either hit the iFly devices so there is obviously something going on here.   The build is an improvement, but still not solid for the RasPi 2 board w/ Edimax.
When I connect our same software to other devices like iLevil, SkyGuardTWX, etc they all work 100% of the time.  With that said, we are confident this is a Edimax dongle issue.  I've got a RasPi 3 I'll test next and report back, but I have a hunch it will work.  I'm also going to try some other dongles I have around the office to see if they work too.