Unreal Engine 4 2D PixelGame stuttering

Hello,I have a problem with my game every time when I start game the game stuttering and have wavy screen…have 60fps and resolution at 1920x1080 Fullscreen this waves in game make it unplayable…Can someone say whats the problem? Thank YOU!
Here is video with problem UE4 Wavy screen/Stuttering - YouTube