I'm using browser, Chrome, but I don't think I have any of those. Is it the Chrome that is the issue?
I’m so sorry I missed this post of yours until now.😭
I have tested it on a freshly installed Chrome on Windows, and the game saves properly.
It could also be caused by external cleaner programs that automatically clears your browser storage data.
If you don’t have any of those, then it’s probably something else that I’d have to figure out.🙂