Initially, I thought the issue was related to Hubdoc. However, after receiving a pop-up from QuickBooks Online (QBO)(I couldn't find the pop-up now), I realized it wasn't Hubdoc. And another example, when posting an entry from the bank transaction page, it appears twice in the books, but the net amount matches. I've checked for similar issues and found that I'm only experiencing this problem on October 1st. I manually corrected 10+ invoices posted.