There are springs trying to keep it locked all the time. WITHOUT POWER APPLIED, it has the ability to overcome the springs and allow the side gears to slip, making a bit of a ratcheting noise. Releasing the throttle around corners can allow this to happen.
I have Aussie lockers front and rear on my '93. I do NOT lock the hubs on dry pavement. Of course, the rear is always in use. I am getting into the habit of coasting around tight corners. But it takes practice and planning. Turning a corner while starting from a stop sign or traffic light is a situation where you don't have much choice. You must apply power to get moving. Therefore, tire wear and stresses in the axle and differential occur. Getting in and out of parking lot spaces is another situation. You need a light touch on throttle and clutch in these instances. It's just a different driving style to learn.