To Know about my game:
I was playing against a Half-Blood. I had a slow had, so, when one of my otyughs turned into a maligned cell I couldn't save him (or eat him). My creature field was filled with cells in no time.
The Bug:
Both me and the AI had a graveyard (he had an UP-ed one), if one of my otyughs ate something on his field while my field was 100% full the AI didn't get any skeletons. If I ate something on my field (or reversed them back to my hand) and so freeing up a space on my field, the AI and I got a skeleton as well.