I am using the Ethereal Flame preset from library-content-backgrounds. The Slit Scan filter is part of this preset. At about 8 seconds in and then at intervals after that, the image will scroll up to black and then the image will reappear. I have fussed with the parameters but can't get rid of the scroll to black. I have even brought in another copy of the preset and started it at 7 seconds in and the scroll to black still appears at 8 seconds. If I deactivate the Slit Scan, the scroll to black stops but the image does not look the same and is not what I want. Does anyone know how I can get rid of the scroll to black? Thank you.