Items not added up, but added to cart separate

-- HikaShop version -- : 2.6.3
-- Joomla version -- : 3.5.2
-- PHP version -- : 5.5
-- Browser(s) name and version -- : Chrome

Hi,

I've got a strange error. I'm using the listing_table. When a product is already added to the cart and I select the same product again in the listing_table, the product does not add up, but a "new" line is added.

So instead of adding up 1 + 1 = 2, two of the same products are in the cart on separate lines. Both with quantity 1.

I've checked the database and in the hikashop_cart_product table I see the same product_id, all with quantity 1. See attachment.

I also got a testing environment which has got no problem (like the live one before) and I have compared both listing_table.php and cart.php. However there are no differences. So the difference must be somewhere else.

Do you know what goes wrong here? Where can I look for the solution? Any clues?

Thanks!

Hi Nicolas,

There are no variants or options for the products. I understand it is hard to see the problem this way.

Can I send you login credentials is some way to have a look? The "shop" is only for registered users.

Recently there was a change in all the product codes. Maybe it has something to do with that. I'm not sure if the problem already persisted before that.

Thanks.