HMD Unmount is treated as pressing the secondary trigger button

I have an application where an action is started when the user presses the secondary trigger button (the trigger button of the right hand controller). During testing I regularly take of my headset to check Unity's Android Logcat window and I noticed that every time I unmount the HMD a new action starts.

So it looks like the unmount event is treated the same as a secondary button press event.

I do get a notification every time I start the project that it uses the new Input System (which I never activated, so it must be a reault of upgrading to the latest All in One XR SDK or the sample scenes) and that native backends are not enabled and it asks me if I want to upgrade. I select No, because I remember that the new input system is very complex, so I don't want to take that hit right now. Could it be related to this? Is there an InputAction asset in the Meta SDKs? or in the Interaction SDK Samples? I can't seem to find it in the project window. 

Or is this a bug?

Unity 2023.2.22
Meta XR All in One SDK 201.0.0
Meta Interaction SDK samples - Example Scenes