> Does this affect the Canvas+ apps also?
>
I'm not sure, but I read iOS8's auto-clean is allowed to go after temporary generated files or browser generated files when space is low.
I already have 2 users leaving me a 1 star rating cos they lost their save, that's AFTER I put a warning in the app description that they should not be very low or out of storage space else their auto save won't work. People just don't read app descriptions these days!
Ouch, so sorry for you. It sucks when people don't read the descriptions and leave 1 star ratings, been there.
It seems this can affect every game that uses webstorage then. Oh. Shit.