2014 XP 1K Front diff loud pop. Nothing Broken Why?

While climbing a steep hill, my front diff made a loud pop like it broke something. After inspecting the axles and doing an op’s check everything seems to be fine. However, both front axles are now warped. The right axle is a brand new Rhino that was installed just before the ride. I continued to ride for the rest of the day and everything worked fine with no more noises. Anyone have a clue what happened? Old axle was changed for being severely warped.