I'm here to help and ensure that your Citi Card bank is connected to QuickBooks Online (QBO).
We haven't receive any similar report about Citi Card bank feeds isn't working in QBO. For the meantime, let's try to perform the basic troubleshooting step which is to switch to Incognito window or private browser. This is a good way to isolate the problem and check if it's caused by the browser.
Here are the keyboard shortcuts to open a private browser:
Google Chrome: press Ctrl+Shift+N
Mozilla Firefox: press Ctrl+Shift+P
internet Explorer: press Ctrl+Shift+P
Safari: press Command+shift+N
Right after, you'll need to manually update your bank account.
You can also manually download the transactions from your bank's website and import them into QuickBooks using the WebConnect feature. This way, we can make sure you have the necessary transactions in your bank feeds to keep you up and running.
If you need further assistance with the process, I suggest calling our QuickBooks Online Support Team. They have the tools to pull up your account in a secure environment and do a remote session.