Should image lightbox close on page scroll?

1. User clicks on one of the images in gallery.
2. Larger version appears in lightbox.
3. When user scrolls down, should the lightbox close or not?

Live examples;

• On Medium website lightbox can be closed when user scrolls down, you can test it here.
• Lightbox on Quora or Google Photos does not have such behaviour.
• Some lightbox scripts, for example PhotoSwipe, close on scroll.

What do you think? Is it worth implementing or it'll just confuse non tech savvy users?