I have a hikmicro alpex 4k LRF. I go into the menu and set the magnification I want and click the button to lock it in or so I think. Go into, say, ballistic calculator or maybe laser range finding only to find that the magnification has changed from where I set it to the minimum magnification of 3.5x. How do get it to stay where I put it? Note that I DO click the button to lock the selection in. Any help greatly appreciated. Thanks.