How to reproduce:
1. Download the attached project and build it on the tvOS platform in Unity
2. Launch the Xcode build and connect a wireless gamepad controller to the tvOS
3. When the project is launched, hold down B button on the wireless controller
4. Notice that the "Held:" text shows the expected "JoystickButton13" but also "JoystickButton0 " which is a Menu button

Expected result: JoystickButton0 should be only shown as "Held" when the Menu button is pressed
Actual result: When B button is pressed on a wireless gamepad controller connected to a tvOS device, it shows that JoystickButton13 and JoystickButton0 buttons are being held

Reproducible with: 2018.4.1f1, 2019.1.4f1, 2019.2.0b4, 2019.3.0a3
Couldn't reproduce due to "tvOS namespace not existing in the UnityEngine": 2017.4.0f1, 2017.4.27f1

Not reproducible on iOS:
iPhone 6 PLUS, VLNQA00246, 12.1.4 64GB

Note: A suggestion was made that if this is intended behaviour, then it would be nice if it can be turned off via a bool in the UnityEngine.tvOS namespace
(e.g. UnityEngine.tvOS.Gamepad.TreatBButtonAsMenuButton)