QtQuick applications on Android flicker when started (regression from Qt5.2)

Every time you start a QtQuick application on Android the screen flicker for the first few frames. It seems that the items are resized to the display resolution after a few frames. This produces an unpleasant "flicker" of the screen. With Qt5.2.x this don't happens, the application starts correctly and items are not resized.

I've attached a naive example, basically the QtQuick template project where I've added a Rectangle anchored on the top of the screen so you can better see the artifact on startup.

The bug is present on every QtQuick sample.

Edit: added four screenshots that show the startup of the sample attached, you can clearly see that frame2 and frame3 are wrong, items are positioned wrongly. frame4 is the correct frame. The startup sequence is very fast, so you see the screen "flicker" for the first few frames.