Problems with Facebook's Unity SDK on iOS (FB.Feed)

We started using Facebook's SDK in our game.

We are trying to post "brag posts" when people win against their friends, and we use FB.Feed with the friend's ID in the "to" parameter.

In iOS devices running with an older FB app version, a small popup opens up inside the game - and it works perfectly well.

However on devices running the newest FB app version, when we call this function the FB app is opened, completely losing focus from our game, and an incorrect brag post is shown and attempts to post it on the user's wall (instead of on the friend's wall).

Anyone else had this problem and figured out how to fix it?

Thanks