Ion-tabs with ion-side-menus

I can’t make ion tabs to work with side-menu. maybe i miss something basic since i’m now to ionic but once i wrap my content with ion-tab the content disappears.

using this example i replace the “Tab 1 content” with form and ion-list so both disappear. Do you know the reason, maybe i’m using ionic in wrong way ?

Got the same behavior here, i’ve tried all the different code found on other answers like mixing with Ion-view, ion-content but not result.

But I found this

The difference is that the tab is toggled by the menu not a previous ion-view.