Yes it was a new save. If anything I imported one of my premade sim's that I have up on the Gallery, so there's a chance that one of his reward traits (which he has many of) or skills (part of me is thinking the meditation one) have something to do with it. Possible that it's coming from something else from the Spellcaster perks. Haven't gotten around to testing it on a fresh sim, but was after I first noticed it, it was happening all the time on that save for him.
UPDATE:
So fiddled some more. Tested on a new save and a sim I randomly threw together in CAS. Tried to reproduce it and everything worked as it should. Dropped in a new copy of the premade sim I was testing the pack with and made him a Spellcaster as well as cheated his spells. Went to reproduce and no issue. So decided to load up the save I was having the issue in and, to my surprise, the issue wasn't showing itself. However, I still had an older copy of that save where he was having issues right at the save point. The issue still remained there. So not entirely sure what's going on there now. I guess it managed to correct itself at some point during that save, but only later on as I can still make it happen with older copy of the save.