Flickering Sprite Issue

I was wondering if anyone has had flickering sprites when moving their mouse, and if there are any solutions to this that you all would happen to know.

Video of issue:

How are you having the sprites stay facing the camera view? At the end of the video the sprites looked as if they had flipped toi an odd direction, maybe the flickering is caused by them flipping back and forth?

well they are using a custom engine to do that, however it is the same even when i put a sprite in the world that is just static and doesnt have any attached blueprints. Any thoughts?

Caused by motion blur