Paradox, Erkberg,
Just tried a simple test, but couldn't recreate the problem. So it seems this issue only shows up on larger projects, with more to save!
In the project mentioned above, I was using WebStorage alongside the Save & Load option. At the time, I did wonder if the two may have conflicted in some way.
I'll keep on looking for a solution, as I'd really like to make use of this very handy option, in my mobile projects.