If the issue persists, try clearing your browser's cache and cookies or using another browser to isolate if this is an unexpected QuickBooks behavior. This will refresh the browser's history, resetting into its default state.
Before doing so, you need to save necessary information such as login ID's and passwords.
You've got this. This information should help with your invoices concern. I'm here to answer if you have questions about this info or anything else in QuickBooks. Enjoy your day.