Hi dawn-withers-car,
Welcome to Community! Having the ability to print your invoices in one batch is a valuable time saver in QuickBooks Online. When the feature isn't working as designed, it can have a negative impact on your day.
Our Development Team is currently investigation this concern. Although I don't have an ETA for resolution, you can contact our Customer Care team at 1-855-253-1536 from Monday to Friday between the hours of 9 AM and 8 PM EST. They will be able to add you to the list of affected users, and set you up to receive an email notification when it's been fixed.
Please feel free to reach out again, if you have any other questions. We would be happy to help!