See https://listnr.corp.google.com/report/69232916247

"The task bar is hidden, but when I touch (on touch screen) near the bottom, the app on the task bar at that location still get launched. For example in the attached screenshot, when I touch on next page button (">") on the current screen, Google keep is launched instead --- it's at that location if the task bar is not hidden."

Version: 59.0.3071.134