Coach I would also appreciate to listen to what you have to say on this.
I suffered a very similar thing during squatting yesterday. It is the 10th rib (the last one before the floating ribs) at a point directly above the ASIS. At the bottom position there was a "pop" accompanied by pain.
I've searched and found your answers in several similar threads (healing will take 2-3 weeks tops, use knee wraps to train/sleep if needed) so I am not worried about the injury. I would be interested to learn what may have caused the injury in order to prevent it from happening in the future.
Used no belt, very confident of maintaining proper form. I am taking in an as-deep-as-possible breath prior to each rep.