Color swatches by name, only in one product

I installed the plugin and started using it and works as expected. By now Im implementing it with one of my product categories. I define color swatches to appear instead of color names, BUT one of the products shows names instead of colors!

Examples working fine:

https://www.plotteus.com/tienda/display-pop-y-expo/stand-portatil/microcounter/?v=836396f53c84

https://www.plotteus.com/tienda/display-pop-y-expo/stand-portatil/simplecounter/?v=836396f53c84

Example with the problem:

https://www.plotteus.com/tienda/display-pop-y-expo/stand-portatil/quickshowcase/?v=836396f53c84

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