What could be causing repeated issues with vendor ACH setups in QuickBooks Bill Pay?

Try opening your QBO account on any private/incognito browser.

Hello there, @seamusiclover.

It looks like you've asked a similar question and one of my colleagues has already given an answer. You can access his reply from here:  Re: How can I manually enter vendor ACH information without it disappearing?

If you have follow-up questions, let me know by leaving a comment below. I'm more than happy to help you again. Keep safe!

That does not work,

Why is quickbooks selling a product that is not functional?

Another option, sign up for a Melio account to compare and it's more reliable. You can ask your vendors to register their ACH details online to avoid errors. You can also get the cashback to pay bills.

https://quickbooks.intuit.com/learn-support/en-us/reports-and-accounting/has-anyone-been-able-to-set...

I appreciate your feedback regarding the QuickBooks product, @seamusiclover.

QuickBooks is designed to provide a seamless experience with its strong features. However, there are instances where some functionalities don't work as expected or have issues. In this case, a thorough investigation is required. 

Based on what you're currently experiencing, our team is committed to investigating these issues regarding vendor ACH setups to ensure you can continue to use our product easily. You can contact our Customer Support team for updates on the investigation. 

Meanwhile, you may visit this article to learn how you can manage vendor payments in QuickBooks: Learn about QuickBooks Bill Pay for QuickBooks Online.

We appreciate your patience and cooperation during these times, @seamusiclover. Should you require any assistance or have further QuickBooks concerns, please leave a reply below. We'd be glad to provide the necessary help you need.

I hope this is resolved soon. I have not received any updated since the case was created.

I acknowledge how important it is to receive any update from QuickBooks Online (QBO) to work smoothly and without obstacles, Seamusiclover. Not to worry, I'm here to assist you.

I highly suggest contacting our Live Support Team for assistance to have updates regarding Vendor setups in QuickBooks Bill Pay. They are equipped to investigate the cause of this issue and to get updated.

Here's how:

1. Sign in to your QuickBooks Online account 
2. Select the Help (?) icon at the top right. 
3. Type in your concern, then click Let's talk. 
4. Choose Contact Us to connect with a live support agent. 
5. Select Start a chat with a support expert or Get a callback from the next available expert. 

Feel free to check this page to learn more about using bank rules to automatically categorize transactions and more:

• Set up bank rules to categorize online banking transactions in QuickBooks Online.

If you have any inquiries or require support updates in QuickBooks Online, feel free to share them here in the Community. We are always ready and eager to assist you.