What gameplay feature is this bug affecting?
Idk

What's the issue? Please include any error messages you receive and as much detail as possible.
I had a reverse heat and well i aged up the cubs and they were not sent over, they were kinda hovering before I got the mods involved and they helped out.

Any links relating to this bug? For example, if a particular lion is bugging, what is the link to that lion?
no

Any screenshots you can provide us with?
I cant

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 sent a reverse heat
I ibf the girl
I aged up two of the lions i liked
they were not sent over
The only way to get to them was through the cubs bred on my king or the moms, it said in my pride but was not.