Hello, Stevesmith. 

Have you tried opening your QuickBooks using a private window (Incognito)? If not, let's go ahead and open your QuickBooks using incognito. It is possibly a browser-related issue. Also, this session disables the corrupted cache in your browser and prevents unexpected QuickBooks Online behavior. 

Here's how:

• Google Chrome: Press CTRL + Shift + N.
• Safari: Press Command + Shift + N.
• Mozilla Firefox: Press CTRL + Shift + P. 

If it works, you may want to clear the browsing history of your regular web browser. This will remove previously stored browsing data that might have caused the issue. Otherwise, you can try using other supported browsers to be thorough. Another option is to use the browser health checkup tool to see if your browser is compatible.  

If the same thing happens, I suggest contacting our support team directly. They have the tools to further investigate and check your account in a safe environment, and they can help find the root cause of your issue and find a fix. 

Check out the Send multiple invoices in case you need this process. Also, you can send reminders to customers when their invoices are to be overdue. 

I hope this helps and resolves your issue. Keep me updated on if it works for you or if we need to do some additional digging. Have a fantastic day!