There is a new setting on the Shopify store settings page:
Import orders with fulfillment holds
image
When the setting is enabled, if an order is created with a fulfillment hold (which is common with Post-purchase offers) the order will be imported and a 90 minute hold will be placed on the "hold until date field" of the order. If the hold is released by Shopify during that time, the hold will be removed in ShipHero as well. If the hold is not removed by Shopify it will be released on Shiphero after 90 minutes.
If this setting is not enabled, orders containing a fulfillment hold will not be imported into ShipHero until hold is released.