Sale Badge Does Not Show before clicking on different variant

[lojabuzz]

Here is the thing: When my product page loads, this "sale badge" does not show on the first time, only when someone clicks on variants.

(Percentage badge)
PS: The page loads with a variant already selected.

Exemple: (https://zapexpress.com.br/products/poliwax-cera-automotiva-com-efeito-polimento)

When I change the variant:

 

(Both variants are with discount)

[lojabuzz]

Hello, could someone help please?
UP!