Yeah, Agent A, I have faith in our plan.
Womantis, I've had that happen before, which is why I mentioned the whole "dead within 24 hours after a molt" syndrome (or something like that). It happens randomly it seems, a perfect molt and then bam, dead. Luckily, I've only experienced that event once this season with a M. religiosa female (a shame, but good thing I have an army). The californicas were different in that they would die either before a molt or right in the middle of their instar.
Unless I misread your post and you didn't mean they die within 24 hours of molting. But I don't have an answer either way, it sucks, that's why I try to have multiple breeding pairs.