Land Rover Discovery 2, Electric wing mirror issues.

[ZOLLAR]

I currently have a Discovery 2, when I retract the wing mirrors the driverside wing mirror comes in but the passenger side doesn't.
I have to press the button again to get the passenger one in.

Is this a common fault, I've previously had a Discovery 1 ES but never experienced a problem with that (although I can't remember if it did have electric wing mirrors)

Any ideas on what the cause is and how to rectify?

Thanks