Champions stutters on edge of screen only

Recently I've noticed that any champion moving onto my screen stutters on the periphery of my field of view as they come into view. Once the full champ is on screen the stuttering stops. Anytime they move off the screen the stuttering starts again

I haven't changed any hardware/software nor any in game settings. I can't remember if it started in patch 6.1 or 6.2, but it is a recent development.