I have no experience with bp breeding, but I do know they tend to stop eating around the breeding season. Although I've heard that ovulating females usually start going crazy for food and then stop eating, so I'm not sure in your case. Since they both locked that could be what's causing it, and the stuck eyecaps probably aren't helping on the one that has them. All you can do is just keep trying (also, if you've been offering f/t, offer live instead and vice versa), but it seems to me it's probably just because they're in breeding mode. But again, I'm no expert haha