QT Quick memory leak with dynamic animation reset

I was testing a simple qml file with animated PNG using PropertyAnimation. There is this simple event handler:

onStopped: {
  if (to===320) to=8;
  else {
    to=320;
    gc();
  }
  start();
}

I've noticed that my app was steadily "eating" memory. I've tried my qml in qmlsceen and it had the same problem also.