That's an important thing to understand. When I'm on a snow covered shelf road, the lockers aren't on until I need them. They will push the Jeep forward and to the downhill side which is usually the cliff edge. Using only the front locker gets to be really important.Being 'in' snow is different than being on a trail or street with just a thin coating of snow or ice on a hard surface that makes the underlying surface slick enough that the lunchbox locker doesn't have enough traction to help it to unlock through turns. Automatic lockers, lunchbox or full-carrier it doesn't matter, have trouble on snow or ice covered surfaces. I did some icy trails years ago and every guy with an automatic locker was sliding everywhere and mostly down toward the low-side on off-camber trails. They were having a hell of a time... which is why many call automatic lockers "low-side finders".
Frankly, I don't care to be on snow covered trails with shelf roads to begin with.