I believe Steve is correct, the adhesive got dissolved, the tip simply fell out.
It happened to me, on a rebuilt cantilever/stylus, one day the stylus was gone. I used liquid stylus cleaner frequently on all my cartridges then.
It happened to my friend's Benz Micro Ruby Wood, Steve was able to put a new MicroRidge in the existing hole in the cantilever, glue it, and put a warning not to use liquid stylus cleaner on it.
Steve just repaired another friend's Grace F9 Soundsmith replacement stylus and warned my friend not to use liquid stylus cleaner.

