Hand interaction building block in Unity project visually broken + issue with gestures

I have a project I've set up with the All in One sdk. 

However for some reason, adding the Hand Interaction building block to an otherwise empty scene leads to strange visuals on the hands - they are only visible in the left eye, and strangely distorted.

Using the locomotion the gesterues for turning or teleportation (thumb on forefinger) don't work either.

Doing the same in a clean project does work.

I'm wondering if the behaviour above (especially the left eye for the hands) is known, and if there's something obvious (from that description) I've broken/done wrong in my existing project.