I can help you with getting your latest transactions from your Capital One account, @sweitz25.

After updating your bank connection manually, try to check your bank's website if you have the latest transactions. If yes, go back to your QuickBooks Online and verify if there's any additional authentication. You'll need to follow the onscreen steps to continue the update. 

If there's none, I suggest clearing your browser's cache. It's possible that a piled-up cache in your regular browser caused this unusual behavior when trying to refresh your bank connection. You can clear your current browser’s cache to resolve this. 

Go to your account by using a private browser or an incognito window, then try to reconnect this bank. If it works fine, clear the cache in the one that you're currently using.

Here’s how to go incognito or use a private browser:

• For Chrome, press Ctrl + Shift + N.
• For Internet Explorer or Firefox, press Ctrl + Shift + P.
• For Safari, hold down Command + Shift + N.

If it works, here's how to clear cache and cookies to fix issues when using QuickBooks Online. Restart your browser right after. You can also proceed by using other browsers if the steps above don’t work.

Refer to the following article to know more of what you can do if you don’t see your recently downloaded bank transactions in QBO: What to do if bank transactions won’t download or there's a bank error. 

I'm always here if you need help or assistance with your bank connection. Just leave a reply below. Take care and have a wonderful day!