Steps to Reproduce

In a view, status bar is hidden...

if (ChqMeasurements.isLandscapePhone(context)) {
      SystemChrome.setEnabledSystemUIOverlays([]);
    } else {
      SystemChrome.setEnabledSystemUIOverlays(SystemUiOverlay.values);
    }

However, the app bar's height does not change. App bar just has more space at the top. Material Widget AppBar does not recognize property "preferredSize", so it can't be manually adjusted with that.

Since the purpose of hiding status bar is usually to get more screen space, this seems like a bug.