Let's manually update your bank account by toggling the Update button. Let me guide you on how.
Go to the Transactions and select Bank transactions.
Click on the bank account.
Click on the Pencil icon and click on Edit sign in info.
Manually enter your banks User ID and Password.
Click on Save and Connect.
Then, verify if new transactions have downloaded. If the situation is the same, let's use a new incognito window or another supported browser to log in to QBO and use the steps above again to refresh connection.