Yes, there is currently an ongoing investigation about the AMEX bank accounts not updating downloaded transactions. Our Online Banking Team is actively working to get this issue resolved.
However, let's perform some basic troubleshooting steps that can help us sort out the problem. Switching to a different browser or clearing your browsing history to update the bank connection can also help. Aside from that, you can manually update your bank account to check to help sync all the transactions. Here's how:
Go to Banking at the left menu.
Choose the account.
If prompted, enter your Multi-Factor Authentication (MFA) credentials.
If the transactions aren't still downloading, I'd encourage contacting our Customer Care Team. They can add your company to the list of affected users. By doing so, you'll get email notifications about the status of the issue.
Currently, we still have an on-going issue on syncing your AMEX bank transactions in QBO. Rest assured, our engineers are all hands in working for a fix.
We haven't received any update to our product engineers as of this time. To keep you posted, I recommend contacting our QuickBooks Customer Care so they can add your account to the list of affected users. This way, you'll receive an email regarding the issue once updates become available.
Thank you for your patience while we're working for a fix.