Thanks for the detailed report! I’m honestly stumped as to what might be causing the issue but I’ll do a fresh test myself tonight, including trying the game in Firefox.
If you’ve been using Firefox to run the game’s index.html and playing that way, try to play with the built-in browser by launching the game .exe instead, but I doubt there’s any simple way to pull your save file over if you did that. Unfortunately that’s the best solution I can offer until I pinpoint the issue.