I had something similar happen earlier this summer, but with much different conditions. Mine had been sitting at 64%, took 3 with me on a camping weekend, each in a tubo for physical protection. I am in a low RH area and camped in a similar environment. 2 of them were perfectly fine, but my Tat Brown Label started unraveling like that, but much earlier in the smoke. i still have no idea what happened, as it was in perfect shape before lighting up. It still smoked fine, but I had to be careful with the wrapper...