I have a little different but similar problem with the disappearance of tabs.
I am writing an application using the Series 60 Multiple view architecture, with multiple views and navigation tabs. In one of these view, I implemented a text editor (CEikEdwin). However, my debugging shows that if I use (CEikEdwin.SetFocus(ETrue)) to turn the focus onto the editor. That view shows ok. However,
the navigation tabs will not be there after the call.