Apple TV gamepad B button always exits app after app has exited once with exitOnMenuPress=true

[8bitmatt]

Below is a slightly modified version of the gamepad test script (used to verify this bug).
On-screen button fill color is green when exitOnMenuPress = true, and red when exitOnMenuPress = false. (Note: testing with SteelSeries Nimbus controller)

Steps to reproduce:

1. launch app
2. press R1 (sets exitOnMenuPress = false)
3. press Menu button (does not exit as it should)
4. press B button (does not exit as it should)
5. press L1 (exitOnMenuPress = true)
6. press Menu button or B button (exits app)
7. press A button (to re-enter app)
8. press R1 (exitOnMenuPress = false)
9. press Menu button (does not exit as it should)
10. press B button (app exits! From this point on, no matter what exitOnMenuPress is set to the B button will exit)

canvas.width = window.innerWidth * window.devicePixelRatio;
canvas.height = window.innerHeight * window.devicePixelRatio;
canvas.style.width = window.innerWidth + "px";
canvas.style.height = window.innerHeight + "px";

var ctx = canvas.getContext("2d");

var scale = canvas.width / 1280;
ctx.scale(scale, scale);
ctx.font = '32px Helvetica';
ctx.fillStyle = '#fff';
ctx.strokeStyle = '#fff';
ctx.lineWidth = 2;

var drawButton = function(button, x, y, action, gamepad) {
	ctx.fillRect(x - 24, y + 24 - 48 * button.value, 48, 48 * button.value );

	
	if (button.pressed && action === 'enable') {
		gamepad.exitOnMenuPress = true;
	} else if (button.pressed && action === 'disable') {
		gamepad.exitOnMenuPress = false;
	}
	
	ctx.strokeStyle = button.pressed ? '#0f0' : '#ccc';
	ctx.strokeRect(x - 24, y - 24, 48, 48);
	ctx.strokeStyle = '#fff';
};

var drawAnalogStick = function( axisX, axisY, x, y ) {
	ctx.beginPath();
	ctx.arc(x, y, 64, 0, 2*Math.PI);
	ctx.stroke();
	
	ctx.beginPath();
	ctx.arc(x + axisX*48, y + axisY*48, 16, 0, 2*Math.PI);
	ctx.fill();
};

setInterval(function(){
	ctx.clearRect(0, 0, canvas.width/scale, canvas.height/scale);


	var gamepads = navigator.getGamepads();
	var gamepad = gamepads[1] || gamepads[0];


	if (gamepad.exitOnMenuPress) {
		ctx.fillStyle = "green";
	} else {
		ctx.fillStyle = "red";
	}


	if( !gamepad ) {
	ctx.fillText('No Gamepads connected', 32, 32);
	return;
	}

	ctx.fillText('Using Gamepad: #' + gamepad.index + ' ('+gamepad.id+')', 32, 32);


	// Button Mappings according to http://www.w3.org/TR/gamepad/#remapping

	drawButton(gamepad.buttons[0], 928, 354); // A
	drawButton(gamepad.buttons[1], 994, 288); // B
	drawButton(gamepad.buttons[2], 862, 288); // X
	drawButton(gamepad.buttons[3], 928, 224); // Y

	drawButton(gamepad.buttons[4], 412, 96, 'enable', gamepad); // L1
	drawButton(gamepad.buttons[5], 868, 96, 'disable', gamepad); // R1
	drawButton(gamepad.buttons[6], 288, 96); // L2
	drawButton(gamepad.buttons[7], 994, 96); // R2

	drawButton(gamepad.buttons[12], 352, 224); // Up
	drawButton(gamepad.buttons[13], 352, 354); // Down
	drawButton(gamepad.buttons[14], 288, 288); // Left
	drawButton(gamepad.buttons[15], 416, 288); // Right

	drawButton(gamepad.buttons[16], 640, 196); // Menu

	drawAnalogStick(gamepad.axes[0], gamepad.axes[1], 540, 416); // left stick
	drawAnalogStick(gamepad.axes[2], gamepad.axes[3], 736, 416); // right stick


}, 16);