Gradient Fill turns gray when exporting to PDF
I'm making a box in pages, choosing gradient fill. White colour on both fills, the second one with 0% opacity.
This to create a faded impression over an image.
Everything looks great in Pages 7.2 with OS X Mojave 10.14.
When exporting to pdf, or choosing print and export to pdf, the white gradient box will turn gray.
Tried the iCloud version of Pages with the same result.
Pages in iOS however dosen't do this.
How can I resolve this?
MacBook Pro (Retina, 13-inch,Early 2015), macOS Mojave (10.14), null