Northeastwrecks once bubbled...
Actually, that depend upon how you rig it.
I've got the mouthpiece secured with a zip tie. Instead of routing the bungee through that zip tie, I use a second zip tie.
If the bungee got yanked hard, for whatever reason, the bungee would pull off, but the mouthpiece would remain secured.
Well, I've never had a mouthpiece pop off in my octo holders in 20+ yrs. off diving. And I've never seen this happen to any of my buddies. I'm sure this isn't a problem with most 7' hose config. guys either. Maybe just 1 or 2.