Hello, martyn yemm.
So far, we haven't received similar issues reported. Let's run some basic troubleshooting steps to isolate the problem. We can start by accessing QuickBooks Self-Employed account in a private window. This usually resolves any browser-related issues.
Use these keyboard shortcuts depending on the browser you're using:
- Google Chrome: press Ctrl + Shift + N.
- Mozilla Firefox: press Ctrl + Shift + P.
- Internet Explorer: press Ctrl + Shift + P.
- Safari: press Command + Shift + N.
If you're able to email and receive the invoice via the private window, let's clear the browser's cache on your regular web browser or you can press CTRL+Shift and Delete key on your keyboard altogether.

However, if the problem persists, I'd suggest getting in touch with our QuickBooks Self-Employed Support to have this investigated. Unlike in this public forum, they have the tools required to perform any escalations in the system whenever necessary on your behalf.

Please let me know if you have any other questions. I'm always here to help and provide you additional assistance. You have a wonderful day!