Woocommerce on Sale Variation price Problem

Good morning,
I have a problem in my ecommerce with every product that has variations of price. This problem happens when i need to insert a sale on the price.

I’d want the same result of the products that have no variations of price.

Instead, what i see in the pages of products with price variations isn’t the list price before and after the sale but only the final price already discounted.

I upload some photos to explain what i wrote:

product without a variation of price – OK!

product with price variation – NO!

product with price variation – I would like this

Thanks in advance