Why do I have to RE-connect my bank EVERY TIME I log on to QBO?

Welcome to the Community, @bulldogltd. Let me address your concern about a disconnected bank in QuickBooks Online.
 

The first thing I can suggest is to look at a possible browser issues. Stored cache can caused unexpected issues so let's try to do some basic browser troubleshooting actions first.
 

Here’s how:

     1. Restart your browser.

     2. Open your browser's private window.
     3. Clear your browser’s cache.

If the error is about banking updates, please refer to this link for the steps: What to do if you get a bank error or can't download transactions in QuickBooks Online.

If issue persists, I suggest contacting our QuickBooks Online Support for assistance. They can investigate this issue further for you.

If you have any further questions or concerns about reconnecting your bank, I'm here to help you in any way I can. Enjoy your day!