I created a simple tour using the latest krpano version (1.20.6). I used the "MAKE VTOUR (VR-OPT)" droplet and didn't modify the tour.xml that the droplet generated. On every phone I've tried to access the VR mode from, I have the following glitch: if the phone is in landscape mode when accessing VR, everything works perfectly, but whenever I access VR from portrait mode, I can only see the first half of the left eye and have to exit VR and enter again in landscape mode for it to work properly.
My tour is uploaded at https://migueldeavila.github.io/SimplePanoTour/index.html and the .xml is at https://migueldeavila.github.io/SimplePanoTour/tour.xml
If anyone could enlighten me as to what's going on, I would really appreciate it!