Summary: When playing with WASD, the option to evade in the direction the character is moving evades in a random direction or not at all.
Details: I use this setting on live with no issue. On PTR, when I try evading in the direction my character is moving, it will sometimes evade in a random direction, or just do the evade animation but stay in place. The option to evade towards mouse works correctly as a workaround.