Hi, building my first ionic 2 app and loving it so far. Have run into a hurdle where trying to show and hide the navbar based on a *ngIf fullscreen variable. When the nav gets shown again, it has lost the back button, even though from debugging I can see the nav controls view stack is the same. See plunker here for example https://embed.plnkr.co/c0msjyOVvfWj4SwDICoI/
Wondering if there is another way I should be doing this or if this is a bug?