Hello, @RedOL.
I can share some info about the inconsistency you're having when trying to update to the new experience for your invoices.
There's an ongoing issue when trying to update to the new experience using the Update Layout button. It doesn't stay on New Experience. Our Product Engineering team is already aware of this and is now working on a fix.
In the meantime, I'd recommend getting in touch with our Customer Support Team. By doing so, you can be added to the list of affected users and receive an email notification once we resolve the issue.
You can reach our Customer Support for QBO by going to the Help icon at the top right of the account. Then, let them add you to Investigation No. 94713.
Follow the steps below:
- Go to the Help icon to connect to a live support agent.
- Go to the Search tab and click on the Contact Us button.
- Provide us with some information about your concern in the What can we help you with? box and click on Continue.
- You'll now be provided options on how to connect to our Customer Support.
You can check this article for more information about the different types of support we offer and their availability: QuickBooks Online Support.
After transitioning to the new layout, you can experience the new features available in QuickBooks Online, including updates to estimates and invoices.
Let me know in the Reply section if you need more help or information with moving to the new layout. I'm always here to assist. Have a great rest of the day!