So Google Analytics is getting data from the Flash version on the PC?
It might be that the HTML5 version has a bug - in my recent testing using krpano 1.17 (from PTP2) I've been having a lot of trouble.
I should note that under krpano 1.16 (from PTP1.8) the analytics still seems to be working ok in HTML5. I'm not sure if it's the new krpano version or how PTP2 uses the underlying krpano javascript code that is causing the issues...
Please let us know if you end up having any success with the html5!