Hi,
I’m also experiencing strange ajax behavior. The ajax cart-add api returns 422, but still adds the items.
I’ve even managed multiple times (although cannot reliably replicate it) to add a product again and the ajax api does add up the quantity. But instead it returns 2 items with the exact same item.id, qty, variant_id and even key!
The only difference I can see is that an automatic discount applies differently to both items.
One says:
“discounts”: [
{
“amount”: 76,
“title”: “10kroff”
},
The other:
“discounts”: [
{
“amount”: 77,
“title”: “10kroff”
},
This discount is an order-level discount with fixed amount, so it seems to be correctly divided onto those items. Except that these items should have been merged by the ajax api.