CorelDRAW X3 :: Changing To Colour Still Prints Jobs Out As Mono?

I print to a Canon Colour Image Runner printer. The default colour setting is set to mono.

I've noticed when I open a colour image in Coreldraw, navigate to Print Setup, change the job settings to Colour, then print, it still comes out mono, or sometimes come out as a random combination of both mono and colour.

I've found this to be caused the setting called 'Output colour bitmaps as'. This appears to set itself to match the default printer settings on the host pc. Ie my printer is set to Mono by default, hence the above setting sets itself to Grayscale to match. If i choose to print my Coreldraw document in colour, the above mentioned setting remains set to Grayscale, hence the printed output is for bitmaps is grayscale, not colour as i selected.

Likewise if i change my printer defaults to colour, the 'Output colour bitmaps as' setting changes itself to RGB, and then there is no problem.

I assume this is a bug, as if one of my users chooses to print a document in colour, then it should come out in colour. It shouldn't be necessary to change *another* setting to achieve this.