What gameplay feature is this bug affecting?
Heritage

What's the issue? Please include any error messages you receive and as much detail as possible.
This lion's heritage (linked below) shows Pei'Kat is her dad on her page, but upon clicking her heritage, Pei'Kat is gone. Pei'Kat was Gen 2, so this lion was originally g3, but as Pei'Kat and his parents disappeared, the lion now displays as G2.

Any links relating to this bug? For example, if a particular lion is bugging, what is the link to that lion?
https://www.lioden.com/lion.php?id=794210371497


Another broken:
https://www.lioden.com/lion.php?id=794201723186

Any screenshots you can provide us with?


Please provide us with step by step explanation how this bug happened so we can attempt to replicate it. If it's complex, please include screenshots where possible:
I'm not sure how to replicate this. Pei'Kat is not a grandpaw nor stored in my dynasty.