Has she ever dug?
I feed/gutload both superworms and crickets with dandelion greens, kale, collards, mustard greens, escarole, squash, zucchini, sweet potato, carrots, sweet red pepper, etc and a tiny amount of apple, pear, melon, berries, etc.
If you've only been using the calcium twice a month she could be short of it and it might be stopping her from laying eggs. I'm not a vet it's just an opinion/possibility.
I dust lightly at all feedings but 4 amonthnwith a phos free calcium powder, twice a month, 2 weeks apart with a phos free calcium/D3 powder lightly and the remaining two times, two weeks apart with a vitamin powder that contains a beta carotene source of vitamin A.