I am with Mr. Purdy on this one. I also think this is the main reason why players started to carry a separate break cue, even before the phenolic tips came out. It is also one of the likely reasons that Frank Paradise, back in the 50s and 60s made cues with screw on ferrules that could be replaced during play.
I shoot with cues that have ivory ferrules, but break with synthetic. Also, when I get a tip, I always make sure they place a fiber pad between the tip and ferrule. They are cheap and provide (in my opinion) a better surface for adhesion.