When using the Qt Quick 2D Renderer, if you close and reopen a window containing a ChartView, the chart is invisible until it is forced to redraw by resizing the window or moving the mouse over it.

A test case is attached. To reproduce, build and run, then click "Show Chart Window". A window will display with a line series in a chart. Close the window and reopen it by clicking the button again; the window will appear with blank white contents. Moving the mouse over the window or resizing it will cause the chart to reappear.

While running this test case and my application, I noticed numerous copies of

Updates can only be scheduled from GUI thread or from QQuickItem::updatePaintNode()
 

in the console.