Hi there, @WallyB. I appreciate you for sharing an update about your concern. 

Currently, we have an ongoing issue with invoicing with Google Calendar. And our Product Engineers are working to fix it as quickly as possible. While they do, I recommend reaching out to our Customer Care Team, so they'll add you to the list of affected users. 

To reach them, click the ? Help button at the top-right corner and select Contact Us to talk with a live agent. Ensure to review their support hours to know when agents are available.

You might also want to read this article to learn how to use invoices with Google calendar: Invoice with Google Calendar FAQs.

Lastly, I've included this reference for a compilation of articles you can use while working with us: Sales and Customers for QuickBooks Online.

If you have any other questions, please let me know by leaving comments below. I'll be here to lend a hand.