Can't reproduce here.
Closing as won't fix even if there is a problem. Tiling sprites for the background is the most inefficient way of doing that as described in Performance Tips:
[quote:alpo6ee0]Using Sprites instead of Tiled Backgrounds
Creating too many objects can cause slowdowns, and a common mistake is to use grids of Sprite objects instead of Tiled Background objects. This is similar to using tilemaps inappropriately. For example, a 20x20 grid of sprites has 400 objects, which is a significant impact on the object count. A single tiled background can replace the grid of sprites and it only counts as a single object. Tiled backgrounds are specially optimised for repeating their texture so in this case it is literally 400 times more efficient than the grid of sprites. Always use Tiled Backgrounds instead of repeating Sprites wherever possible.
Use a tiled background instead, which also guarantees seamless rendering.