m, it's not a bug but a feature. Sell'em for 10 bucks a roll.
I once bought 2 packs a 10 rolls. The first brick was fine, strong curl but a very good emulsion usable up to EI 400 in Caffenol. Used up in a couple of months, I was delighted. The second brick was in the cooler, the first rolls were still OK, but after only 1 year the last rolls showed the same faults as discussed here.
A pity. After those problems became obvious, the film disappeared as fast as it became popular, probably because the merchands were flooded with complaints. Would be interesting whether the film is still produced and sold in China.