Overview page works with responsive layout but not grid layout...why?

Setup, Configuration and Use Beginners
1

I’m wondering what the reasoning behind the overview page displaying when resposive layout is chosen vs grid layout.

The following works:

config:
  layoutType: responsive
  label: overview
blocks: []
masonry:
  - component: oh-masonry
    slots:
      default:
        - component: oh-clock-card
          config: {}
grid: []

But the equivalent grid layout shows a blank screen

config:
  label: overview
  layoutType: fixed
blocks: []
masonry: null
grid:
  - component: oh-grid-item
    config:
      x: 0
      y: 0
      h: 4
      w: 16
    slots:
      default:
        - component: oh-clock-card

Is this a bug or is there a reason to choose responsive layout for the overview page? (asking since I’m building pages for tablets with known dimensions)