I am using an iPhone SE, and the function useFrontCamera is not working. My phone does have a front camera, and the rear camera and default camera functions do work, as I can test the function by switching cameras using the Zappar UI header, and then switch back to the back camera with either of those functions, but not the front facing camera.
Sorry if this is the wrong board for this, but I was not able to find anything mentioning this problem, and could not find a report bug board.