Greetings @LocalDeadZone and welcome to the forums!
Thank you for reporting this issue to us, but could you please use the given Bug Report Template?
This template has most of the information we need to start investigating and will make the process a lot quicker for everyone 
You can find it here: NEW Bug Report Template
If possible, please add some screenshots of different thralls with the same face and share us your save file as well so we can have a better idea.
Thanks in advance!