Welcome to the Community page, @cacoissa.
Allow me to chime in and share some insights about the autofill payee feature of your imported transactions.
QuickBooks only autofills the Payee field on your transactions if there's a rule set for it. Let's verify and disable the rule feature in QuickBooks Online.
For more information, you can refer to this link: How to set and use banking rules for downloaded transactions.
That should do it, @cacoissa. Let me know how these steps work out for you. I'll be here to keep helping. Have a great day.