Camera starts at floor level 2019.2 + MRTK v2.0.0

For some reason everytime I load the scene on my Hololens 1 the camera starts at floor level and the scene content doesn't appear to anchor to the floor in the real world..

Using the MRTK demo project files I've created a scene and added in the MRTK packages, configured spatial perception in the player settings, turned on the spatial awareness settings, set to room scale, added observers (checked they're working), added the spatial collider and renderer to an empty game object, and scratched my head many times..

Anyone know what I'm missing/doing wrong?