I have been using Scribus for years, but I repeatedly encounter the problem of complex SVG graphics being displayed incorrectly. This type of error frequently arises with shading or color gradients. Unfortunately, I cannot simply edit and resave the SVGs in other programs in the hope that they will then display correctly in Scribus.
This question has surely been asked before, but apparently, there is no solution for it.
See as example the relative simple SVG attached. It is always ok but in Scribus terrible.