The funny thing is they only disabled it on the 15 Pro, other devices can still use back tap to mute.I noticed they have removed the mute function for the back tapping. The option no longer exists to mute/unmute device by double tapping the back. This defeats the purpose for me. I would have expected to use the action button for something like camera and double tap the back to mute/unmute device. So if I want to mute the device I have to set the action button to silent mode.