I don't have any of the DJI screw-on props to look at, but I imagine that they have the same pressed in hub, and that is certainly a weak spot.
The other problem with the screw-ons is if you set you motor breaking too high, you can spin them off, especially with these carbon props that seem to have a lot more mass. I've turned my braking to the lowest setting, and then I am very careful when fitting the press fit hubs to the motors. It would be easy to over torque them and weaken the press fit bond, leading to the issue you had. (I'm not saying you did that, a prop strike, or a manufacturing defect would do it too.)
Your English is great BTW.