I have a frustrating situation and I am looking for some guidance. I have P3S and have issues with the RC signal dropping out intermittently on the control side. I can be flying along, no homes open desert, and go from 4-5 bars in signal strength to signal lost/RTH instantly. I have the problem on both 1.5.7 and 1.6.8 firmware installs. I can have the loss at 300' or less and it is very intermittent. My max distance ever was over 6200' but now I am lucky to get 15-1600' with no obstructions. I am using the ARGTEK antenna. Before you say it, I have checked and rechecked the connections multiple times. The signal can cut out flying away or towards you with no warning at all. I have no loss of video signal at any time. Any advice on where to look next? Antenna on the drone looks intact and I have had no hard landings or crashes that might affect the onboard antenna. Thanks for you help.