Adding elements in new subgroup only visible after at least one pan/zoom

[smee]

I want to show multiple subgroups in a specific order. Then adding elements in a new subgroup the new elements are rendered on top of already existing element. I have to drag/zoom at least once to have timeline-plus shift the new elements to the correct vertical position.

You can see the effect here: https://jsbin.com/xirukovuha
The demo adds two new elements after 2 seconds. Each element is in another subgroup. You can see the 'C' element only after panning/zooming once.

[ShynRou]

@smee I ran into the same issue, until somebody fixes it, you can force a redraw with timeline.zoomIn(0.00000000001)