Variable Products – Review content missing

Hey.
Great Plugin so far, and we use it since years. But for now (don´t know how long it´s not there anymore) we have no content within the review-tab. THis happens just for variable products. Single Products are still fine. So we can click on review-tab and no content is shown. Also the source code don´t show any content for the whole review-tab. It seems striped out from the loop itself. When I deactivate your plugin, the content appears and everything seems fine. 🙂

Can you have a look at this issue? I think it comes with some of the latest WooCommerce Updates.

Thanks
Maik