I have experienced the same problems too, out of every pack I've bought atleast 2 or 3 have broken. This can be frustrating when buying loco specific packs such as the hst or 225 ones. I have also found that the glue used to hold the magnets in place can be prone to fail. I have bought the newer ones, and yes they are flexible but too flexible and fish tails provide no grip and just slide out. I won't be buying them in the future.