Couple thoughts, many of which echo what has already been said, since I had 2 breakoffs this weekend on braid dipseys without snubbers, using 12lb mono leader.
I keep the release tension set pretty light so trash fish trip it. The first breakoff happened when the netman hit the fish in the face, so a big cause, the leader was only a couple weeks old. Tied a new one with 12lb mono and the next day it broke as soon as the fish struck (but had caught a few in between). Put my snubbers back on after that.
So severeral things you can watch:
Release tension
wear and tear on the leader, or abrasions
watch the drag setting on your reel, I probably had mine to tight, i think this is key when using braid.
leader storage, I wrap mine on a cylinder, otherwise you get kinks which = weak spots