Do you have any addons like script blockers, cleaners or something like that?
It seems like something on your browser blocks the local saving, so the game reverts to your online save.
Hmmm. That is a good question. Perhaps you had x100 active? Either way, we will look into this and see what could be the problem. Thanks for letting us know.
We're currently looking into this. We'll post an update once it's fixed.