Artboards adding white line to top of image when scaled smaller through "Export As"

[andie_6297]

I'm exporting a series of headshots. One of the artboards is 1000px by 1250 px. When I scale down to 240x300 it adds a white line to the top of the image. However, this does not appear when scaling to 50% (500x625)

[Stephen Marsh]

I recall something similar being reported in the past, I can't recall the specifics, except the white line. As this is Export As, I'm guessing that there wasn't a fix.