App control never returns from Facebook login in Xcode 7 Simulator

Hi, I had code running of Xcode 6.4 simulator, which basically logs into Facebook and then, when the app regains control I show the user name and pic.

After being forced to update Xcode to 7.0, the app never gets control back. The simulator triggers Facebook page, but after successfully login, it either:

    - never get back to the app

    - in another case, a pop up in Facebook page asks “Open page in app?”. Even tapping Cancel or Open, the app never gets the info from FB (not sure if it’s FB itself or the plugin)

Anybody with the same problem?

BTW, the same code works perfectly on Android. I’m just about to check on an iPhone 6 with IOS 8.x

Thanks, Pablo