I hope someone can help me, I've been searching for days now and I can't find out what's wrong here.
We created a simple "Buy X get Y free" rule, with the settings as follows (click the image to enlarge):
- Buy 3, get 1 for free
- Apply only if products match a certain attribute set
But it won't apply:
We're using Magento CE 2.1.2
Edit: I found out what the problem is. We have 3 separate cart items (each with qty 1), but the rule only works if there is one cart item with qty 3... so I guess I have to customize the discount calculation of magento...