Hey, thanks for taking your time to reply.
I really don’t think that would ever work for the same explanation you gave. However, I was reading through the engine source code and in GoogleVRHMD.cpp I found a couple of lines which I think are the ones responsible for enabling the UI.
If you browse to line 458 and 459 of GoogleVRHMD.cpp file which is in Plugins/Runtime/GoogleVR/GoogleVRHMD/Source/GoogleVRHMD/Private you can see that the comment above those lines says Show UI on Android.
I haven’t tried yet to change them and recompile but I will give it a go and write back.