Variable Product doesn’t work

Hi!

I’m trying to get this plugin work using variable products. I already used this plugin in the past with one product per gift card amount. Now, in order to have a single entry point for customers buying gift cards, I created a variable product that bundles all the single gift card products as variations. Everything works from the frontend side and the customer can buy and pay for his gift card(s), the order is completed correctly and the gift card data is saved (to/from/note) but the customer doesn’t get the gift card email at the end. Is there anything that I’m missing here?

Thanks in advance!