Hi @malvveli ,
I checked your link. Probably, the current variation selector interface you are using is not supporting our plugin or not compatible with it.
I checked this on our dev site with our WPC Variation Swatches used for the variation selector and it’s working properly: https://app.screencast.com/biOfGGuhtwOIb. You can kindly consider changing back to the default selector interface or our swatches plugin to make them work in sync.
Best regards.