I have two of them. I dropped one on some rocks 5-6 years ago and it put this fracture/soft spot in the stock right under the cheak piece (not a sheep hunter). It wasn't an extremely hard hit and I was a bit surprised that it did as much damage. They seem to be slightly on the brittle side but what do you expect out of an aging lightweight stock.
I’d get ahold of Mark Bansner. Bet a dollar he’d send you a new blank. I’ve never had him question any warranty claim, even when it was a customer’s fault for doing something silly. I knew a guy who put one on a rifle for a customer and he broke it at the wrist when he buttstroked a wounded fox, I think he even got a new one.