Hi there,
On 67.002, I'm having this issue where character levels are being set back to a lower level when they are possessed. In the previous update, I leveled Faylen to 85. Then I possessed her with Celica's spirit in this update, and Faylen's level was set back to 55. I then leveled her back up to 90, then her level got set back to 72 when I possessed her with Celica's spirit again.
There was another case with Selena getting possessed by Cephrina. My Selena was level 80 before this update. She then got possessed by level 90 Cephrina, and her level increased to 85.