Hi. Warehouse theme support said that this is prestashop bug, so I write it here.
Real time example:
- Product Yamaha CLP-625R, quantity - 1, available backorder (if quantity - 0, still available for order is enabled).
- User if FO looks at the product and can see that Availability label is "In-Stock" (in picture.: Turime), and delivery information is "Delivery 1-3 working days" (in picture.: Pristatymas 1-3 d. d.)
- User want to buy 2 products. Now he change quantity to 2 and product section refresh.
- After refresh user can see that Availability label is "Possible to order" (in picture.: Galima uzsakyti), and delivery information remain same as before, and this is the problem.
Delivery information have to change to "Delivery 2-4 weeks" as defined in BO, because user at least have to know that delivery time will be longer, cause there is 1 product we don't have in stock at the moment.