QQuickPaintedItem does not redraw for secondary screen

I've encountered a strange bug using QQuickPaintedItem. When application window is on the primary laptop display (Retina 13") everything works fine.

When the application is on the secondary, external display QQuickPaintedItem only shows the very first draw.

Debugging shows that the paint(..) function is being called, and dragging the window back to the primary display switches the texture to the updated and correct texture.

I'm guessing the texture for the secondary display is not being updated for some reason. I tried the patches suggested in QTBUG-38321, but they didn't have any effect.