After pulling 5.11 (qtbase, qtdeclarative, qt3d), attempting to open a new scene (File->Open) or reloading now fails on Windows with
May have something to do with the recent bulk changes in qt3d/5.11.
Same happens with the Studio3D, Q3DSWidget, Q3DSSurfaceViewer that - unlike the viewer - use QRenderAspect with Qt3DRender::QRenderAspect::Synchronous. These already fail with a similar error when initializing for the first time.
Note that qt3d's scene3d example fails the same way.