Product images not responsive

Hi

The product images are not fully responsive. The images shrink down on smaller devices but the height of the .flex-viewport doesn’t – which create a rectangle and a huge space under the image. Will this be fixed in the next release or can you tell me how to fix it, please? I tested this on your demo site and it gives the same problem:

http://demo.outtheboxthemes.com/shopstar/product/tee-and-star-scarf/

Thanks
Tash