Ever had this happen to a Bomber?

[Chris in Mass]

Not sure of the full story since my 11 year old was the surfcaster in charge here. This past fall, we were on the beach near a jetty in SoCo. He was closest to the rocks. He believes he made a good cast and does remember a slight pull. He didn't think he hit the rocks or got snagged in the jetty. One in six of his casts can go awry (short, high, left or right). So I don't think I have the full story since I didn't see the cast or where it landed (don't think he is sure either). He ended up reeling in the top half, and about 5 or 6 waves later the bottom half came rolling in. Clean break. Inside the tube there are two small round tabs pointing inward from each side. It broke right after these tabs. Doesn't appear to be any pressure marks, dents, or imperfections near the break inside or outside (course i'm no materials expert). Anyone have a similar breakoff?