Is there currently a known problem forwarding purchase invoices to QBO by email?

There is no known issue with QuickBooks Online (QBO) email forwarding right now, but what you are describing could be caused by the attachment file type your supplier is sending. When invoices arrive as PDF.BIN files, QBO cannot process them through email forwarding. For now, you can manually upload them directly into QBO as a workaround.
 

Here’s how to do it:

1. Open the supplier email directly in your inbox.
2. Download the attachment and save it to your computer.
3. In QBO, go to Accounting, then Receipts, then For Review.
4. Select Upload from this device and choose the saved file.
5. Review and match or create.
    

It is also worth letting your supplier know if their invoices are arriving as PDF.BIN files, as that could be causing the issue on your end.
 

Let us know how it goes, and we will take it from there.