Windows Phone app freezes when ImageParticle use 'sprites' property.

I deployed 'touchinteraction' app from Qt 5.5.1 examples on Microsoft Lumia 535 with updated Windows Phone 8.1. Chose 'Bear-Whack' position from menu, clicked on screen to start. Bears started to falling down. After a while app freezes. I checked code I found it happened when 'ImageParticle' use 'sprites' property. When it doesn't use sprites property and use 'source' property it works.

On Windows Phone simulator everything works fine.

I checked other example apps which use 'ImageParticle' and also they freeze after a while. I wonder whether Qt supports Particles mechanism on Windows Phone 8.1.