Motion Blur does not work in Scanline Render.

[Jumpei.F]

Hi.

When I render with FFX motion blur enabled in Scanline Render, sometimes it does not apply.
If I change the Duration of Motion Blur or change the renderer several times, and then render again in Scanline Render, the blur may be applied.
Also, when I render with Backburner, the blur is not applied.
Is this a bug?
The version of FFX is 5.1.

Thanks.