Redirection does not work

Hi,

i activated AMP on Posts, but not not on homepage.
If one of the Posts is selected, the AMP plugin does not redirect in mobile device to the AMP post.

However, when I also activate to show the homepage in AMP (as custom front page), then the redirection works for posts. So how to eliminate this and only select and redirect posts, and let pages , homepage and everything else in its original format?

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