Recreating models may result in nothing being rendered. Easily reproducible with the benchmark demo app:

• start the benchmark app (you may use --preset midrange if not highend desktop)
• change the model to any other

-> nothing gets rendered

• change the model again to something else

-> models get rendered

It seems the sceneManager->dirtySpatialNodeList is not cleared every second time, as doing the steps above with 1 model results in 3 dirty items in the list when things get rendered and 7 when nothing is rendered.