Hi there! I understand your Renshuu app is continuously refreshing on your Windows 10 device using WebKit browser, is that right? To better assist, could you please share a bit more about when this refreshing happens? For example, does it happen when you start the app, during a lesson or quiz, or randomly during use? Also, have you noticed if you are being logged out or if any progress resets when the refresh happens?

In the meantime, I can suggest some initial troubleshooting steps for this kind of issue:

1. Clear browser cache and cookies: Sometimes old or corrupted cache can cause websites to behave strangely. You can clear this from your browser settings.

2. Disable browser extensions/add-ons temporarily: Some extensions might interfere with site operation.

3. Ensure your browser is updated to the latest version compatible with Windows 10.

4. Try accessing Renshuu in a private/incognito window to see if the issue persists.

If the issue continues, it might be linked to account syncing or session stability. On forums, some users resolved similar problems by adjusting their kanji knowledge settings (like marking kanji they already know at N1 level), but that might be more relevant for account resets rather than refreshing issues.

Could you confirm if you are getting logged out or losing progress as well? And have you tried on another browser or device to see if the issue remains? This info will help me narrow down the cause and guide you to a fix.

Looking forward to your reply!