Mate; I am suffering from the exact same thing. Mine doesn;t hurt, but I wait for it in the swing, and it really disrupts me, causing me to drop shots as I am waiting for the crack to sound, and not focussing on the task at hand. Always seems to reoccur when I have important matches coming up; ie. now !! Not good.
It is my left shoulder, btw; I am a right-handed player. Most infuriating
There has been a history of arthritis / oesoporosis (2 X sp.) in my family, so that is what I reckon my case is
