Using version 4.21.2, every time I call Draw Material To Render Target there is some sort of motion blur effect that occurs on the camera.
This works using the Third Person project. Just make a render target, make a material, call Draw Material To Render Target in the Tick() function of the player. When the player moves, there will be intense blur around the character.
It goes away if you turn off motion blur in the project settings, but this did not fix the issue in my project where I discovered this issue, only in the blank project.
Anyone have any idea what could be going on?