You mean his A3 "Seal of Magic". I have him fully booked and mastered and he always starts with Seal of Magic no matter in what turn order and where I use him. He may be first to go and still he use SoM even there is no party skills to be reset. I guest it's because that extra turn meter on that A3. But my Kymar is pretty consistend to use that A3 first. 

Hi,

Could you post a video, pls?

Well mines not fully book and it's not using seal of magic first on spiders 20 for me 

He also did not use the "seal of magic" the second turn.

I literally cannot beat spider 20 on auto if he does not use seal of magic