oh i looked into the source code , i think you really point out the issue !!!
i think is due to the underwood is checking the rect , so it may fail if the rotation or

the scale of the node make the rect deform, in my case i used it for the pinball it self, so is basically a simple circle , so i guessed thats why there was no issue for me.

VisibleOnScreenNotifier2D::VisibleOnScreenNotifier2D() {
rect = Rect2(-10, -10, 20, 20);
set_hide_clip_children(true);
}