Aiming drift

I made a post about this earlier, but thought I’d provide more info to see if someone can help me fix the problem. My aiming tends to drift up or flick up. This is usually most noticeable when I aim down sights especially near enemies. Sometimes when I aim down sights the gun will start to flick up/drift to the sky really quickly. I’ve checked for controller firmware updates, I’ve tried different controllers, I’ve played with dead zone and aim assist settings. Has anyone else had this problem?