Product Variation issue

Hi,

I’m having an issue with variable products where the discounted price is not displayed correctly in the size selection dropdown.

What is working:

• The main price on the product page shows the correct discounted price (e.g., 979,30 zł instead of 1399,00 zł).
• The price in the cart is also correct after adding the product.

When a customer clicks the size selector dropdown, the list of variations (XS, S, M, L) still shows the old, non-discounted price.

You can see a clear screenshot of the problem here:
https://monosnap.com/file/bVzNqaJKYQdF2F6gGvJ8QYd6htGI0a

Configuration:
We are using a “Product Adjustment” rule with a percentage discount (-20%). In the “Filter” section, we are selecting specific “Products” from the list, as other methods like filtering by Tags or Category are PRO features in our version.

Troubleshooting Steps We’ve Already Taken:
We believe this is a JavaScript conflict with our theme. We have already tried the following standard solutions without success:

1. Enabling the “Advanced Option”: “Do you use a third-party plugin or custom code to set product prices?” to Yes.
2. Checking the setting When prices should be shown with a strike through. Our version does not have an option to “change the price on the product page itself”, so we could not force it this way.
3. We have thoroughly cleared all server, site, and browser caches after every change.

Could you please advise if there is another setting, a hook, or a known workaround to resolve this conflict with theme scripts that handle variation prices?

The page I need help with: [log in to see the link]