Lansinoh Milk Bags Breaking?

This is my third baby I've pumped for at work, and I've always used the Lansinoh freezer bags to store the milk in. Over the last month though, my mom who watches my baby while I'm at work, has asked for more and more milk, she said the bags keep breaking. She said when she thaws it, there's a hole in the bottom of the bag.

There's definitely not a hole

when I put the milk in there, because I'd see it leak everywhere. Has anyone experienced this recently? I don't want to lose all the milk I work so hard for, I don't have enough excess to get behind.