Teleport no longer works on Quest

I mean, I think it worked at one time. I could've sworn it worked when I first fired up the Quest locomotion example a month or so ago. But now, teleport doesn't work. Unity 2018 or 2019. 

I'm at a complete loss, and surely it's not just me. I restarted with a clean install of Unity 2018.4 and the latest Quest install on the Unity Asset Store, just to make sure. 

I followed the instructions for rebuilding the android manifest, and at least that got me back up and running, and I'm avoiding 2019 like the plague since the Button Down bug is still there.

Does anyone know what could be wrong? Anyone else seeing this problem?

Thank you!
-Chilton