Hi,
thanks for noticing, that didn't happen before...
As it seems this is due some conflict with the 'wakelock' hack, maybe related to a recent iOS update...
With disabling the mobilevr_wakelock setting the video will work again (but when without wakelock of course):
https://krpano.com/plugins/webvr/#mobilevr_wakelock
I will check this further of course.
Best regards,
Klaus