Google Cardboard: clicking doesn't work

[Armaxis]

Just tried out the VR experience on my Nexus 5X running Android Oreo with basic Google Cardboard. Animation and initial landing location load fine, head tracking works, but clicking on points of interest or on terrain does nothing. Initial tooltip about 'how to use' stays on screen.

Tried tapping on phone screen directly instead of using Cardboard's button - still no results. It's ignoring any clicks completely.