Hello,
Please check the video attached in the private section.
As you can see in the beginning on product “Craft beer Ale” I have attached the product attribute by the admin dashboard.
On the second product “Craft Weizen” i have attached the attribute by the vendor dashboard. You can see that the attribute relation to the product is not saved in the table – “w6Rwc_product_attributes_lookup”.
After I have delete the attribute and updated it from the admin dashboard the attribute has been persisted after the update of the product. And all relations are okay.
We’ve reached out to Dokan Support and their answer was that the theme we are using is interfering with this logic and so here we are.