Because your sprite4 uses the "physics behavior" and is not set to "immovable".
So on start of your layout, the sprite4 is falling down (though you can't see it since it has no texture) and ends up colliding with sprite2 (the green ball).
Remove the physics behavior, and it's working as intended.
Also please prefer using the "Edit post" option in "Post options" rather than posting several posts in a row.