Thank you, that's useful info! Now I know at least one other is using localStorage without any issues.
I'm starting to lean towards thinking it's something my end, unfortunately I've been unable to figure out the steps to make it happen yet, it just seems to happen randomly. xD
If anyone else has any insights, I'd greatly appreciate it.
And if I figure out what's happening myself, I'll report back for others who may encounter a similar issue in the future (even if it does turn out to be my end haha).