Help fixing discount price issue in Magento 2

The problem is as follows: We have same products that have a discount price, but it is not all the products that shows this discount price in the product overview, see attached image. But when you click on the product, the brown shirt highlighted with red on the image above, then you can see the normal price.... We want it to also show the normal price along with the discount price, in the product overview. I have marked the "Normal" price with a red cirkel in attached image. So it needs to show both prices in the product overview (the first image). And it seems to only be a problem with products that have different color variations on it, where you have to chose a color and size. I believe this should be a fairly easy problem to solve for an expert, but please let me know if you can fix it, and how much you would like to get paid for it? :)