Discount code – coupon code not excluding bundles

I have a coupon that customers can use, but I don’t want them to be able to use it with the bundle (since it already has discount). In the coupon settings I have set that it can’t be used for products ‘on sale’ and I have even excluded the product bundle in the coupon. However, the coupon still applies to the product bundle, thus giving customers a double discount. I think woocommerce just looks at the individual items within the bundle when applying the discount.

How can i fix this?