If she is doing that regularly, yeah, that is a problem. There is just something wrong with her egg factory, probably genetic. If you have a problem with one hen, you have a hen problem. If the problem is across the flock, you have a flock problem. If the eggs the other hens lay are OK you don’t have a flock problem. It’s the individual.
I don’t know how you are feeding them calcium but it sounds like her body is not absorbing and using the calcium she’s eating, at least not for egg shells. If she is consistently laying eggs like that she is not doing you any good, you are just paying for feed to feed her. And she could teach the others to eat eggs. I’d permanently remove her from the flock, soon.