shopifyCustomer model to our app, and we have done a full re-sync on our development stores — however on our shopifyOrder model only a small percentage of orders have the customerId backfilled once this process has run. There doesn't seem to be any pattern as to which orders get backfilled and which don't — I thought maybe it was the 60-day order limit, but we've got orders from more than 6 months ago that have been backfilled with a customerId.