I've been working on the principle that the Kp-index is an important pre-flight check and that anything higher than 4 could interrupt the GPS signal, and that it could explain some of the flyaways, but others are now saying that it doesn't make any difference and that they wish people would stop drawing attention to it. Does the Kp-index make any difference to the GPS signal? Did it previously but doesn't now because of firmware upgrades? Does it/did it only affect certain DJI models? Does it/did it only affect Phantoms? Have DJI every made any official announcement about it?