Hi there, @ccraig-stemania.
QuickBooks Online uses browser cache files that temporarily saves your browsing data. When it’s full, you could experience unusual behaviors like having the balance on the register not to update.
To get this issue sorted out, you may sign in to QuickBooks in an private window. It stops the cache files from saving new data and makes your browser work fresh.
Here are the different keyboard shortcuts to open them:
Once done, you can double check if the balance is now updated. If it works fine, go back to your regular browser and clear the cache.
However, if the same thing happens after performing the steps above, I recommend contacting our Customer Care Team. They can run a remote-viewing session and help verify on what's causing the issue.
If you can let me know what specific financial institution are you working with, that would be a big help. This way, I'll be able to check if there's an ongoing issue with your bank.
If there's anything else that I can help you with, please let me know by leaving a reply below. Have a lovely day!