QPropertyAnimation tearing and/or stuttering

[Tigran84]

I am using QPropertyAnimation class to animate QGraphicsItems but animation is tearing, items moved not smootly. I used qt5 version. I want to know is it connected with my code, or I need to watch elsewhere . Here is my custom QGraphicItem header and .cpp file which I animate. https://pastebin.com/i7HzyMFC , https://pastebin.com/8TbnbTNG