That's just so sad that the eggs break...and dangerous too. She could retain some of those shells and it would cause a big problem. I've never seen the female to wiggle her tail back and forth like that prior to the egg dropping. Mine don't do that. I wonder if that's what's breaking the eggs.
A bit of that tail wagging was sped up but a few of my females do that with their tails. That wouldn't break the eggs. If you notice the first 2 were broken and not the third. I'm thinking a male mated with her right before laying and that can most definately break eggs like that.