Product addon bug

Dear OceanWp developer,

first of all i want to mention how awesome and amazing your templeate is, i love it alot ! Definetely one of the best themes on the market. You have done an awesome job. I am using it for my woocommerce food delivery site and everything seems to be perfect.
However there is a major bug i have discovered in your theme when using the “yith product addon plugin”.
When ordering a product then adding an ingredient, suddenly all ingredient for the other variations are added too.
I am not sure wheter it is a yith bug or an error form your theme. i tried a few other themes they dont show this behavoiur.

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