Glad you posted. Been having this issue since I started using pro Max on release day. On xs Max this never happened. I have to tap screen 2-3 times to get it to work. Other times it doesn’t at all and I just touch sleep button. I’ve noticed sometimes scrolling will lag. Especially on emails etc. Defiantly a software issue. I was thinking my screen protector was issue. I’ve anyway used my iPhone with a screen protector. Well at least I know now this is an issue with many.