Have never seen one of Tom's JMP Dynamax ever come apart. This unit is tested far above anything your OS will ever acheeve.
I agree with the others that something is array. I think you should send the whole unit into Jet Model Products for inspection and set-up. Then also have someone check the engine runout .

Is this a unit that has the blades repitched? The heat they use to repitch will make the carbon fibers delaminate from the matrix and cause failure.

I still would send it in for a going over .

Marty O