I don't think cinnamons are prone to kinking, genetically. That tends to be associated with caramel albinos. Cinnamons are prone to a "duckbill" effect on their head and nose structure. When a snake kinks though it has to do with their spine. The spine bends at sharp/odd angles. I had a hatchling last season with kinks.



And here I have circled the exact location of the spinal kinks.