If you're using Preorder Pro + Back in Stock and customers are seeing an empty cart after adding a preorder item, check that Continue selling when out of stock is enabled.
Here’s how:
- In your Shopify admin, go to the product page.
- Click Edit on the variant you want to update.
- In the Inventory section, check the box for Continue selling when out of stock.
- Click Save.
After updating, it may take a few minutes for the change to take effect. Ask your customer to refresh the page or clear their cart before trying again.
Originally from our Help Center
