I very much doubt that is a signal strength issue. I would bet good money that the bars on your screen are filled the entire time at 1/4 mile away, and if so you don't have a signal strength problem. Much more likely is that the data feed between your controller and whatever display you are using (smartphone, tablet, etc) is getting briefly interrupted, either because of horsepower limitations with the display or because the OS in the that unit thought it had better things to do ... like maybe interim saving the drone log file or responding to some other input.
I've had the same thing happen fairly often with my
MA2, the standard controller, and an iPad 10.2. I've checked the signal bars each time and they have never been low. It's something else causing the glitch, but as long as it's just a brief interruption it's more of an annoyance than it is a problem. My iPad only has 32 GB of memory so I guess it's possible that could be the problem. I maybe should have bought the version with 256 GB, but I don't (knowingly) have any other apps on the iPad active when I fly. I would have thought 32 GB was sufficient since it suposedly isn't buffering video ... but maybe it is.