When using QGraphicsScene::update() with a rectangle as an input it does not always work, but with no parameter it works fine.

To reproduce:

• run:

  pyside6-rcc resources.qrc -o resources.py
  python main.py
  

• drag the logo around

It seems to get "stuck" sometimes. Especially if it touches the edges of the viewport, but also when it is completely within it.

However, it works fine if you swap the update call in itemChange to the one without any arguments.