I’ve had this issue for some time across multiple versions of Corona - currently on 2015.2553 (2015.2.6).
In simulator most of the views work except for: iPhone5, iPhone6, and iphone6plus. In these cases after I swap to these views I see no window at all. Also if I use the Window/Center function from the simulator menu this does not make it visible. As if the windows are off screen and I can’t get them back on screen or something.
Any suggestions?