Social plugin open AppStore?

local socialOptions = { service = "facebook", message = "Default Message", listener = eventListener, image = { { filename = "image.png", baseDir = system.ResourceDirectory }, }, url = "http://bit.ly/1gLj6ig" } native.showPopup( "social", socialOptions ) 

I have the code above, the url its a short link of the App on the AppStore but when the button is pressed, after show the popup, the appstore with the app page become active on the foreground.

This only occurs on iphone 4s running ios7 on iPad 3rd gen running iOS7 the behavior seems to be ok.

why can this be happening in the iphone? 

Regards