The only way I can imagine that would happen is in transport with something heavy on top of it, did I guess right? Or what happened? I follow them on IG and I'm sure Jerry would be very responsive to a problem, although it is just a 79 cent eyebolt.
I usually run my burner down, not up against the disk, seems to me to get too hot in the center, but full disclosure, I built my own years ago although it is very similar. I just can't see that breaking from the need for torque, love to hear about it though.