If the same thing happens, please contact our Customer Support Team to investigate what's causing this issue. In the meantime, you can manually import your bank transactions using.CSV a file. You can download transactions from your bank's website and upload them to QBO. Just follow the steps and details in the Manually upload transactions into QuickBooks Online article.
Feel free to visit our Banking page for more insights about managing your bank feeds and reconciling accounts.
You can always update us on the result after contacting our support or trying the steps in the comment below. I'd like to ensure this is resolved for you. You have a good one.