It's because you are creating an object not placed on the layout. This means Construct's memory management assumes it is not used on that layout, but then you immediately create it, so it has to load its textures on-the-spot. It is created immediately, but it can't be drawn immediately because the textures are still loading.
It's simple to solve this... just place the object on the layout instead of creating it on startup! Alternatively if you only sometimes need it, destroy it on start of layout if you don't need it, rather than creating it if you do need it.