I usually see this in operations where someone is lifting more than the capacity of the lift, and the steering wheels/tires are coming off the floor, since weight is what usually keeps the steer axle trunion in place, and the bolts only get stressed when the weight comes up off the axle, leaving the axle hanging by the bolts.
always checking that the wheel steer stops are hitting and what stops the axle from turning too far on each PM is always a 'must' (as it takes almost no time at all to eyeball the stops and make sure they are being hit) too.