User blog comment:BonesMcGee/Brainstorm: Potential savings in using the hurry hatch trick/@comment-5180284-20120916132813/@comment-5433714-20120916202202

I think this happens when the game does not have enough time to save to the TinyCo server. I had a lost egg a few days ago. I closed my game too quickly once I saw I had a 10hh and so the egg didn't save. I didn't even get to see what it was. If your dino den was in inventory, it could be that the game not only didn't save your egg but it didn't save when you got your dino den out of inventory for that attempt. There has been some talk of this a few days ago on the fusion reports page as well.