Why is the variant image showing instead of the default image on Studio theme?

Hi,

My theme is showing the first product variant, blue, instead of the very nice offer image. How can I update the code so that the variants are only linked to the image when clicked, but the default images display on load?

So far I have tried updating line 237 of the product-media-gallery.liquid file. Which is:

{%- unless media.id == product.selected_or_first_available_variant.featured_media.id -%}

All that managed to do was hide the dea