My Phantom had been flying really well... but for the last day it's as if the transmitter range has been halved. When it gets 100 or 150 metres away, the failsafe kicks in and brings it home. I can switch out of failsafe once it's nearly home by switching from GPS mode (which I always fly in) to ATTI and re-take control but it doesn't seem to want to go very far. On a couple of occasions it's also felt unresponsive to a bit of forward movement on the pitch stick when it's 100 metres or so away - doing nothing at first and then suddenly responding to what I'm doing with the controls... as if there's some sort of loose connection. Here's what I've done; - taken the transmitter apart and checked the aerial connections - taken the Phantom apart and checked the receiver/aerial connections - done a full calibration of the Phantom & transmitter controls through Naza Assistant (I'm on v3.14 and I was quite happy with it!) - calibrated the transmitter itself as per the Phantom advanced manual instructions - tried switching "Receiver Advanced Protection" on/off within Naza Assistant - changed the batteries in the transmitter None of the above has changed my situation. The Phantom is flying and responding absolutely normally when it's close by - it just keeps switching into failsafe/return to home if it goes more than 100 or 150 metres away. I'm flying in open countryside, miles from anywhere and have never had any problems with range before. It least it isn't flying away! Any ideas?