Discount applied without base product

Hi there,

We’ve been using the WooCommerce Boost Sales Premium plug-in for a while now, but we’ve encountered a problem. I’ll try to explain it as best as I can.

Among many things, we sell mattrasses and mattress covers. When people buy a mattress, we want to offer a discount on mattress covers. So, using your plug-in, we have set up up-sells and whenever a customer adds a mattress to their cart, a pop-up appears and they can select a mattress cover with a 20% discount (the discount is applied using your plug-in).

However, the following problem occurs: when a customer simply adds two mattress covers to their cart (without a mattress), the discount is ALSO applied. But this should only be activated when there is also a mattress present (so only when a customer has added a mattress to their cart).

You can try it yourself with this product: https://www.matrasconcurrent.nl/product/matras-hoeslaken-jersey-stretch-antraciet/

If you add two to your cart and then check your cart, you’ll see that the discount code is automatically applied.

Do you know why the discount is applied automatically here? And how we can fix it?

Kind regards,
Herbert