External link for image

I set the external link to the photo, like http://www.cnn.com. But when i click the photo, it seems to go to <mywebsite.com>.www.cnn.com; in other words, it seems the app is concatenating the hosting website name with the text to the external link. I have tried http://www.cnn.com, and https://www.cnn.com etc, with no difference.

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