I think I might have found the answer.
Backlash is slop, movement, or inaccurate and mushy clicks in the turret due to its mechanical construction and placement in the erector tube.
The Bushnell Elite LRHS 3-12×44 features a Side Focus for Parallax correction.
To prevent backlash, you have to dial the side focus all the way up until it stops. From here you can dial down to the distance you want.
If your side focus is set for 400 yards and you want to dial down to 150 yards, you can do that no problem. But, if you want to dial up from 150 yards to 400 yards, you’ll need to start all over again by dialing up and then coming down.
The goal is to keep backlash completely to one side. If you decided to calibrate from the bottom end up, recoil will only kick the internal mechanisms in the erector tube out of your intended setting.
Always dial up and then come down every time if you’re going from close range to long range.