On my phone, when I go to the Wake Up phone setting, the button is off and the settings under it are grayed out. When I turn it on, the record Bixby screen immediately slides over and covers the settings such as sensitivity. Therefore, I cannot change the sensitivity setting before I try recording Hi Bixby....
I have cleared the caches and memories and started from scratch...same thing every time. I am sure some update will fix this...or maybe I could reset the phone and start from scratch. At this point, I am not frustrated to wipe out everything else