M3 Beta - Navigation drawer not showing all sections

When I create a new form with the navigation drawer layout, this is what shows in the designer:

What I’m not seeing is the spot where I would put navigation links. But if I maximize the code editor, or close one of the side panels, so the code has more width, then I see this:

The spot to add the navigation links now shows, but the top area for the title and icon buttons is gone. That seems a little clunky to work with.

This is on the latest version of Chrome on Windows.

This is something we’ll be looking into
But essentially - if you’re on a small screen - the navigation drawer is collapsed
zooming out of your editor helps

So this also happens when running the app. I’m trying to work out if I just don’t understand how the navigation drawer layout is supposed to work, or if this is just something that’ll get shaken out during the beta.

When I run the app and the browser window is wide, I see this:

When the browser window is narrower, I see this:

I would have expected to see the title of the app and the top links in both situations.

If this is part of what you’re still looking into, that’s fine, I’m just trying to see if there’s something more I need to understand about the best use of the layout.