I am using Arcade (full version) for my site. I have a header image which is more or less square. Last week, I uploaded it and the whole image was viewable in the header. I had to reset the theme over the weekend, and now when I upload the same size header (of any pixel size, on the same scale), even if I "crop" the image to its full size, only a horizontal rectangle in the middle is visible on my site. I can't figure out how to fix it.