Hello, jamesl007.

The most common reason this happened is sometimes caused by having too much cache in the browser. Let's do some troubleshooting steps to resolve the issue. 

Let's start by clicking the Reload icon or hitting F5 on your keyboard to refresh your browser. If the problem persists, try logging in through an incognito window. Here are the shortcut keys:

• Google Chrome: press Ctrl + Shift + N 
• Mozilla Firefox: press Ctrl + Shift + P
• Safari: press Command + Shift + N

Return to your regular browser and clear the cache if it signs you out for 3 hours. It helps remove any browser-related issues and refreshes your browser's settings. Also, you can use other supported browsers.

In addition, you can check out this article in case you experience an issue when signing in to your account: Get help if you can't sign in to your QuickBooks Online account.

You can always post here if you have further questions about the time-off feature. We're all right here to help anytime.