Why are my invoices showing delivery issue

Thanks for checking the error on your end, jowens. I can see there are specific cases or ongoing investigations about the issues you're having with delivery invoices in QuickBooks Online. Let me help you how to fix this.

I can see the challenges and the urgency of resolving them. Our engineering team is doubling its efforts to address the error under the invoice delivery issue. Additionally, I suggest reaching out to the QuickBooks Online support team. This will allow them to add you to the list of affected users.

Here's how:

1. Log in to your account.
2. Click the Help button at the top right corner.
3. Go to the Search tab, then select Contact Us.
4. Enter a brief discussion with your concern, then click Continue.
5. Choose to Have us call you to connect with us.

For your convenience, here are the support hours for different QuickBooks Online plans:

Plus, Essentials, Simple Start:

• Monday to Friday: 6 AM to 6 PM PT
• Saturday: 6 AM to 3 PM PT

Advanced:

• Support is available anytime, any day.

Additionally, you can refer to this article in processing invoice payments: Record invoice payments in QuickBooks Online. 

Following the steps above will allow you to receive updates on the available fix. My purpose is to provide information and assist with answering questions to the best of my abilities. If you have any specific questions or need assistance with a particular topic, feel free to ask, and I'll do my best to help you.