Zeltop just updated Conquest Tweaks because of an issue with inheriting traits. If that doesn't fix your issue let me know.
Viewing post in Old: SfCRevamp
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