On mine the only time mine did anything like that the antenna connections were dirty. I could stand 10 steps from dog and look at the map and it would show the dog 300 yards behind me and a few seconds later be 30 yards the other. I have the 320 with long range on it. I have DC40's and a 50. The 40's were the ones that did it. Haven't had the problem on a 50
Shotgun
Arkansas
. They walked me threw all the software updates had to reinstall it a few times before they showed up. Got the collars updated too. Do you have the Birdseye ?