I appreciate you for performing all the necessary troubleshooting steps to resolve this, @krcmommy.
I understand the importance of filing your 1099s in QuickBooks Online.
Since the issue persists, I recommend contacting our QuickBooks Support Team. They're equipped with tools to check the cause. It'll also allow them to submit a ticket to our engineering team to alert them about the issue if necessary.
Here's how to connect with our team:
Please let me know if there is anything else I can assist you with. Take care and have a good one!