Just received my new Moto X4 to replace my well used and tired Moto Pure X. During the setup process I noticed a static/hissing and popping noise with every Motorola alert and then again with every ringtone. Playing music did not seem affected, just all the preloaded Moto sounds/alerts.
The new X4 downloaded all the necessary updates and I have powered it off and on several times. I have not yet deactivated my old Moto because I do not want to be stuck with this X4 that hisses/pops at me.