Shipping costs wrong vendor

-- HikaShop version -- : 2.3.5
-- HikaMarket version -- : 1.5.1
-- Joomla version -- : 3.3.6

Hi,
I'm not sure if it started after the last Hika Market update, but my invoices assign the shipping costs to the wrong vendor, if an order has products of two vendors.
I have two vendors - one for virtual products like ebooks and another one selling physical products. The setup worked for months, but today I realized that all invoices of the last months with orders that have products of the two vendors are showing the shipping costs the wrong way round. Ebooks have shipping costs now while the invoices for physical products don't show any shipping costs.
It used to work. What could be wrong?
Thanks
Roger

Hi Jerome,
what do you need?
Best
Roger

Hi Jeome,
it's getting very strange right now, because HikaShop/Market assigns free shipping to orders with physical products. That is urgent because I'm sending out a newsletter at the moment and receive orders with no free shipping.
The error occurs only when two vendors are involved. For some reason HikaShop/Market puts my shipping method Download/email to everything, if the first product in the shopping cart is a virtual product. The shipping method Download/email is assigned to one vendor only. I checked the configuration over and over again.
Please go to:
5-elemente.org/de/nahrungsmittel.html and add a product
then go to:
5-elemente.org/de/e-books-und-buecher-3.html
and add a product

Go to 'Kasse' and do the checkout. The shipping costs won't be correct. If the first product in the shopping cart is an ebook, the same shipping method (Download/Email) will be assigned to all other products. If the first product in the cart is a physical product from the category 'Nahrungsmittel' my two shipping methods (DPD and Warensendung) are shown for both vendors and the costs will be doubled.
I hope there is a quick fix for it, because I already received orders with no shipping costs and I'm sure people will not continue the checkout when they see that they have to pay shipping costs on ebooks....

I also get the following error message with my status email:
Notice: Undefined index: 125 in /www/htdocs/w00a755c/33/media/com_hikamarket/mail/order_status_notification.preload.php on line 115

Best
Roger

Hi Jerome,
it seems to work now. I can't check the invoices though.

Now the shipping step is empty throughout checkout. Is it possible to skip this step for virtual products or at least give some information like 'free shipping via email or download'?

Thanks for your help!
Best
Roger