My problem is image delegate only.
I found addiotional regularity: problematic delegates have the same picture as last top delegate hidden during scroll down within ListView.
It seems scrolling out delegate from visible area forces it's image repaint in other delegates, which are in visible area.
This repaint seems to hide the text element, declered with z-order above the image.
Reset the visible property (visible=false, visible=true) at end of each scrolling (using onMovementEneded) solves the problem.
But, i don't want to pay the repaint price of such solution as my application is running on embedded device.