Im getting a signal loss warning at 100'. I shot a 4 minute video but got the signal right at the end? I know there's a lot of variables in why but was curious if it's normal. I have a cell tower about a half mile away and I'm using the Phantom 3 Standard with the latest upgrades. This is only my third flight and was getting the signal on my last flight in a different location. Also, would a range extender solve that problem? If so, which one.