Is it possible water got into the bracket and froze, cracking it? I had that happen on a Merc 850 triple clamp. It was over the steering shaft part of the component. I had it welded and made sure no more water got into it.
In your case, the crack suggests a design defect, if not cracked from ice. If a design defect, and you can get an uncracked replacement, maybe some sort of reinforcement of the component could be done.