Hi
That's what I have seen happen too. No locker. Front Wheels lifts, unloaded half shaft spins at several times speed, putting kinetic energy into entire rotating wheel assembly. Wheel comes down and finds enough traction to transfer all that kinetic energy into strain energy, exceeding fracture capacity of half shaft or CV...dreaded..bang..click..click.. noises, axle or CV gas gone . Also explains why the short shaft tends to break more too.. less material to absorb that excess energy or more energy imparted per unit of volume.
One things I love about lockers over all other systems, traction control, Detroit, ATB,etc. You engage them before you traverse a low traction situations. You then don't have to regain traction. A spinning wheel has a whole lot less traction than a gripping one.
Clive

