I'm using Amazon MCF for automatic order fulfillment which is working great. However, 80% of orders seem to be stuck on a Fulfillment Status of "In Progress". What strange is that if I log into Amazon these orders have been fulfilled, but that information is not making it back to Shopify. I even did a test order myself, received the item yesterday, and the Fulfillment Status on my order is still "In Progress".
The main problem with this is that the automated shipment tracking info email only sends out once the status switches from "In Progress" to "Fulfilled" which has worked for about 20% of the time. I received my test order in the mail without ever receiving a shipping confirmation with tracking info.
I'm looking for ideas on how to get this fixed so my customers get their tracking info as soon as it's available. I already have both "Automatically fulfill the order‘s line items" and "Notify customers of their shipment" checked in my Settings>Checkout.