QQuickView: nothing rendered on Android

I join a small test project. From the menu select "test qquickview". Nothing is displayed. If you press the back button you get this message in the console:

W/Qt (15916): androidjnimain.cpp:542 (void setSurface(JNIEnv*, jobject, jint, jobject, jint, jint)): Can't find surface 2

The same project runs on windows normally.

The "texturepprovider" sample provided by qt is also using QQuickView and runs normally here on Android. One difference is that testureprovider is defined as a QGuiApplication while my application is declared as a QApplication. I don't know if this is related or not.

Note that there is also a "QQuickWidget test" action that crashes on Android, but this should be related to QTBUG-39325

Thanks
Philippe LELONG