Vuescan V9 x64 Washing color of cream art card to white. How to make it treat the artcard as a image not a document?

I am using Hamrick Software Vuescan V9 x64 on Windows 10 with a Canon LIDE 220 Scanner.

I am trying to scan some prints on a light cream colored art card.
The art card has some rather nice texture which I want to keep in the scan as well as the light Cream Colour.

I have tried every combination of settings in Vuescan and no matter what I do Vuescan changes the card (after scanning) to white and loses the texture.

The strange thing is while it is scanning, in the preview window, it sees the art card as I want it to be, light cream with the texture, but as soon as the scan is complete Vuescan changes it to white.

My settings are:

• Input settings
• Media: Colour
• Scan Resolution: 600 dpi
• Filter settings All Off
• Color settings

I have tried every color balance including:

none, manual, neutral, auto levels, white balance and so on

Output settings are:

• JPEG file (tick)
• JPEG profile (tick)

Vuescan is well known as one of the best scanner software including for scanning images and photographs and I have used it for years, but this issue is a new one for me.