I have been using these motors for a few months now and have multiple failures in the exact same location both after only 1 month of use. The spot where you screw in the motor to the mount is too thin and not supported enough on 2 of the 4 screws. This broke off both motors you can see below:
I think the best mounting plate design is full metal without spaces, like Ollin or Alien or @michaeld33 Bitblock custom motors. Also sk3 has a sturdy mounting plate.
Whoever is getting these motors made for them in china should have them change this design to be fully metal all around without so much space in between.