I have now had the same problem occur three times at different locations with my system. I will get everything set up and do a range check with engine off and only have ~10 feet of range. When I return to the shop to try to determine what is wrong I can not repeat the problem everything passes range checking with engine on or off, I even returned to the flying field and put in multiple error free flights between problems (range checking before each flight) it seems like either everything works perfectly or I have about 10 feet of range. What should I try to resolve this problem?