Hi @a4alien ,
May I have some images of the backend settings and a public link to one of your variable products to check it further?
I checked our live demo and test site with the latest version of this plugin, WooCommerce, WordPress and WPCstore theme and everything is working properly. You can check it here: https://demo.wpclever.net/woovr/product/hoodie/.
You can alo troubleshoot by deactivating all other plugins, just keep WooCommerce and our plugin activated to see if this issue still occurs. Then you can reactivate one by one to find the culprit.
Best regards.