Yup, I did turn on the 3d rendering mode right away when I started playing so that isn't the cause of it. I took pictures thru the gear VR lens with another phone and attached them to show how different the scale looks, both are standing in the same spot, I just tapped the touch pad to switch between default and immersive mode, as you can see thru the picture the immersive mode makes the room look tiny by comparison.
I'm seeing the same issue as well with 1.11.0.9 beta, though I get a buggy confirmation box to leave it on or turn it off which I have to tap multiple times for it to go away and it comes up every time. On a Samsung Galaxy note 8 running 8.0.0 and I confirmed that no accessability options are turned on on my phone.