Thanks for reaching out to us and raising this situation.
Let me get the help you need in updating bank account in QuickBooks Online.
To help fix the issue, we can perform manual refresh into your bank account. Here's what you'll need to do:
If you’ve encountered an error upon reconnecting, here’s an article you can follow with guidelines that will help you fix online banking error in QuickBooks Online: How to manually update an account to fix banking errors.
Please let me know how it goes. I'd be glad to further assist. Have a great day!