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Welcome to the Community, @user28944.

Let me help you sort things out.

The stored cache for a long period causes unusual behavior to the browser. You're possibly experiencing a browser-related issue. To verify, let's try some basic troubleshooting procedures.

Let's log in to your QuickBooks Online company using an incognito page. Here are the keyboard shortcuts in opening a private/incognito window:

• Google Chrome: Ctrl + Shift + N
• Internet Explorer: Ctrl + Shift + P
• Mozilla Firefox: Ctrl + Shift + P
• Safari: Command + Option + P

If you're able to proceed with your work, you'll have to regularly clear the cache browser. 

Just hit the Reply button if you have further questions. Have a nice day!