We push things fairly hard here on the TI, but try not to operate very long at torture-test levels, like the ones I've seen on some videos (you bad-asses know who you are!).
Like RH, I see Amazing mast deflection compared to any other sailboat. It unnerves you at times, and you sit on edge waiting to hear a CLUNK, RIP, or SNAP! But it always seems to endure, spill air and recover.
So manufacturing defects, a change in spec, or even improper boat setup could be the culprit. It seems less likely on a new mast that a furling drum has broken loose.
It would be interesting to see picts of the damage to these new masts. Anyone have them?
Without the carcass, all we can do is speculate.