Question about drop shipping and address information

I have 1 OEM distributor that I use to dropship all of our goods. I have their address as the default shipping address and return address as they ship, and accept all of our returns. I have never had issues with invoices, but now Amazon is stating they cannot accept an invoice because they cannot verify the supplier. I spoke with account health support and they said because our account address has our OEM’s address it looks like we are out of the same location so they are not accepting the invoice. Am I supposed to have our physical address in the “default shipping settings” or our suppliers since we do not ship any of the goods from our location? I have not been able to find any information on this anywhere online, and don’t want to open a can of worms by speaking with someone from Amazon about it.

Thank you!