This may not be a bug and has to do with his genetics however I am not 100% sure since he is an appaloosa which all Knabstruppers are supposed to be...I am sharing this here to see if anyone else has had this issue before or if I am totally wrong and just popped out a colt that doesn't follow the Knabstrupper guidelines! This is my first time breeding them so I'm not used to purebreds not being accepted.
I got his genetic test done and looked over his sires lineage, from what I can see he is purebred, the dam is wild so obviously shes purebred as well.

The link to his profile is below

Lets try posting the link hereee

As stated (Directly from the game guide):

I moved this over to Member Help because it's not a bug. It is, as previously stated, a result of genetics :)

Thanks! That makes sense aha

Oceane Elites said:
As stated (Directly from the game guide):

KNN sire X KNN dam = KNN foal IF a filly has LP or a colt has LP and PATN. If a foal does not meet these criteria, it will be a SH.

Not a bug, but I hope this helps!