First, you can manually rotate the removed bearing. Remember to apply an axial force to the bearing and try it on both sides. If the rotation feels like eating, the bearing has been damaged. The reason for the damage may be that the bearing was bumped during installation, and the ball and raceway were extruded to produce plastic deformation.

Second, if the bearing is damaged as mentioned above, then the sound you say should be periodic. If it is not a periodic sound, impurities may enter the bearing.

Third, you can try to change the bearing.

I hope I can help you!