Do you get any errors? I will see if I can replicate the issue. Thank you for the feedback.
I hope this helps
You are right, i did some more thorough testing with the relatives feature with Conquest Tweaks mod and i found the beginning slaves to have no inheritable traits. I didn't notice because they were the only slaves i kept for testing. I reinstalled the updated mod, and the trait bug is still there but i know it isn't your mod causing it now. Thank you for the help