Larian Studios Forums Divinity: Original Sin 2 Divinity - Original Sin 2 - Suggestions and Feedback Pleeease Stop item auto-add

I agree.

For now, there's a temporary fix you can do:
Use one of your other hotbars, like 4 or 5 and put all your skills and items you want there yourself and ignore Hotbar 1. Unfortunately all skills you learn will get auto-added to 1, and that's especially annoying for Polymorph skills like Bull Rush and Take Flight.