Product reviews appear on wrong poduct

Hi there!

I′ve got the following problem: I have a store with 14 products. But only on 2 products, the reviews showing on the front end are from another product. If I look at the product on the wordpress back end, I can see that there are the correct ones, but on the front end, the reviews from another product appear instead of the right ones. Very weird.

If I deactivate the “Customer reviews for woocommerce” plugin, the correct reviews show on the front end, but as soon as I activate it back again, the wrong ones appear again.

Any ideas?

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