I'm not sure if this is a bug, or I'm doing something wrong in both products.
Here's how the vector appears in Affinity products after simply right-clicking on the file and opening in the product:
Here's how the same photo appears in both GIMP and Inkscape, with the color fade.
Any guidance of what I may be doing wrong? I've also attached the vector svg below for anyone else to test with.
Logo.svg