Hi Anna,
We’re using the following versions:
WC-version: 2.6.14
WC Vendors Pro: 1.3.7
WC Vendors: 1.9.8
Before everything worked fine with the free shipping. When I created a coupon with free shipping for a vendor, the products of that vendor were free shipping and products from other vendors did not have free shipping. And now it doens’t work anymore, so I think it has something to do with the alteration with the free shipping, because that’s exactly our problem.
Hope to hear from you soon.