Hello Dear ALL,
I used to fly my Phantom-4 on an agriculture field. Having a horizontal distance of 10-20 meters from my drone, I fly the drone vertically. At 50m, the wireless signal becomes weak and the machine comes to home automatically. I use the signal booster also but still I get this problem now regularly. Please give some advise.

Have you contacted DJI Support on this, possibly a transmitter error.

Please don't take offence, but are your antennae facing the correct way?