I'm puzzled
What is the purpose of posting these pictures. The fracture surface tells the story which is obviously known to the designer.
I presume that the problem is being addressed. Typically you have lots of margin against overload and inspect for fatigue which may be the result of operating factors. If you don't inspect and replace often enough then one bracket fractures resulting in overloading of its mate. System redundancy after that takes you home. Not unique to the manufacturer or am I missing something?