Hello, losing progress in the browser, although it is possible, should not be normal, especially not repeatedly.
Your progress is saved locally in your browser (using localStorage). This means that if you play in private/incognito mode, switch browsers, or clear your site data/cookies, your progress will be lost.
Some browsers, like Safari or Firefox with strict privacy settings, automatically delete local data when you close the browser or have automatic cookie cleaning enabled. That might be what’s causing the reset.
You can try disabling that, if none of the above seems to be your case, please let me know.