История изменений

Это не баг, а фича

Qt Quick 2D Renderer is an alternative renderer for Qt Quick 2 that uses the Raster paint engine to render the contents of the scene graph instead of OpenGL. As a result of not using OpenGL to render the scene graph, some features and optimizations are no longer available. Most Qt Quick 2 applications will run without modification though any attempts to use unsupported features will be ignored.

any attempts to use unsupported features will be ignored

Это не баг, а фича

Qt Quick 2D Renderer is an alternative renderer for Qt Quick 2 that uses the Raster paint engine to render the contents of the scene graph instead of OpenGL. As a result of not using OpenGL to render the scene graph, some features and optimizations are no longer available. Most Qt Quick 2 applications will run without modification though any attempts to use unsupported features will be ignored.