Falsely alerts "No compass detected"

[rhgrafix]

Falsely alerts "No compass detected" on http://richtr.github.io/threeVR/examples/vr_basic.html
Sometimes on my Samsung S4 which has no issues anywhere else, Chrome browser.
Sometimes on my HP Spectre x360 laptop which has an accelerometer and gyroscope, which has no issues anywhere else, Windows 10, Chrome browser.
Can code be tweaked for the newer laptop which have the sensors? I'm not sure why it's sporadic, I can open that link in the same session of browsing a few times in tabs and get random occurrences of alert or not.
Thanks,
R.L. Hamm