So I have a non-optional bar at the bottom of the screen. What is the purpose of the bar? To contain a noninteractive gray square. Why is the noninteractive gray square there? Because otherwise the bar at the bottom of the screen would be empty. This is Android's Emotional Support Square.
Meanwhile, the Android nav buttons, to accommodate this, move randomly between left, right & center. I cannot use the Android nav buttons, *critical for basic use of the device*, without looking at the screen.