using Scribus 1.5.2 and Windows 10: Exporting a two Page Flyer Layout, where I have a gradient fill in a box in the background. The generated PDF is erroneous and cannot be viewed, and after each time generating the pdf I have a new filling structure generated from the gradient at edit>colors and fillings. I guess this is somewhere the problem. (Sorry, I am german)
probably a bug. Don't know how to solve it.