Hello,

First of all, we would like to draw your attention to the fact that your variation gallery configuration deviates from the recommended structure. In most cases, to display multiple images when selecting a variation, the Variation Image Gallery option is used, while the main image is set in the standard variation image field. However, in your case, as we can see, all images are added as additional ones — which causes issues with the updated variation display mechanism.

Starting from the latest updates of the WoodMart theme, we have made changes to the gallery-switching mechanism when selecting variations. This was done to ensure proper compatibility with the latest versions of WooCommerce, particularly after the update described here:
https://github.com/woocommerce/woocommerce/pull/54923

WooCommerce has updated its logic for handling variation images, and accordingly, we have adapted the theme functionality to avoid conflicts and ensure stable operation.

In your case, for everything to work correctly, you need to add or move the image into the default variation image field.

Kind Regards