adding part of retail set to cart (from detail page) adds the complete retail set to cart

[shauke]

Actual Behavior
When navigating from a Retail Set product detail page to the product detail page of one of the retail set products the "add to cart" adds the whole retail set instead of only the currently viewed single product.
It works as expected if one navigates to the single product directly.

Expected Behavior
On a single product detail page the "add to cart" button should always only add this single product to the cart no matter if it is also part of a retail set and if I navigated to the single product from the retail sets detail page.

Steps to Reproduce the Bug

1. Go to a retail set product detail page, e.g. M4548736000919
   https://intershoppwa.azurewebsites.net/Action-Cameras/Sony-FDR-X1000V-Set-skuM4548736000919-catCameras-Camcorders.832
2. Click on a part of the retail set under "This retail set contains" to get to the product detail page of this individual part, e.g. 4548736000919
3. On the product detail page of the retail set part click on "Add to Cart" button to add only the current product to the cart
4. The complete retail set is added to the cart

Note
This might be a problem with a wrong Product Context?