Had a talk with a tuning pro, plastic cage bearings provide better RPM limit, but must be installed with utmost precision, pressure and heat wise,
so having failed bearing at certain hrs goes back to the person, who was assembling the engine.
It is not to save a buck, since plastic cage bearing is more expensive, but more of a hurry, corporate pressure and expertise of engine assemblers.
Remove, install steel cage bearing and avoid further damage.
https://www.youtube.com/watch?v=5RSTnhQcNtw