Why does bank account disconnect without notice?

Hello, usershortsclassicaut. 

Let me provide a possible reason why your bank account gets disconnect in QuickBooks Online. 

This happens when your bank is in the process of being updated or updating in the background. And, great job for reconnecting again the account. This is the solution to keep everything up-to-date. 

To learn more about reconnecting credit card accounts in QBO, please refer to this article: Connect bank and credit card accounts to QuickBooks Online. 

Once completed, your transactions will downloaded automatically. You can start reviewing each transactions and assigned categories on it. Also, I'm adding these articles as additional resources on how you can manage your bank transactions: 

• Setup bank rules to categorize online banking transactions in QuickBooks Online
• Exclude a bank transaction you downloaded into QuickBooks Online

Stay in touch with me if you have follow-up questions about connecting a bank account. I'm always around to help you. Stay safe!