The problem with putting the if inside one window group is that I want both windows to behave differently. For example, they have different size and position, one shows the title bar and the other doesn't. Also, the content of the windows is completely different and has different size. if it's a single window it doesn't resize when its view changes.

Ok, RPSystemBroadcastPickerView and the Button are not related.

Ok, the issue looks to be related to the position of the RPSystemBroadcastPickerView and the UIButton that calls RPBroadcastActivityViewController.load { ... }. Apparently, the picker view has to live exactly over the button, so that the user taps on both when starting a broadcast.