Just attempted it again, two pre-made EA Labradors which I named Blue & Lavender, bred them in the game (not as cas), they had two puppies and both of them were missing a trait.
I have attached pictures of the parents and the puppies so you can see the traits and how they act as though the third trait doesn't exist.
Edit: My Sims dogs just had 3 more puppies, two had random traits (three traits) the other had two traits (one missing)
As of 04/03/2022 this bug is still not fixed, I have also still been attempting this with new saves and new freshly made dogs and their puppies still only have 2 traits if they were supposed to inherit the "smart" trait.
