Forehand issues after changing grip size?

I’m a 4.5 female and switched from a Babalot Pure Drive 98 4 3/8 grip to the New Yonex e-zone 100 4 1/4 grip at the beginning of the year. My forehand hasn’t felt normal since the switch. My teaching pro says it looks like I’m wristing it too much and not hitting through the ball. My forehand used to be my weapon and now I’m running around it to hit backhands. Has anyone else had this problem when going down in grip size? Or switching racquets? I do like the new Ezone but have to figure out my forehand issue? Thoughts?