2007 Espace - Radio/Sat nav doesn't turn off with the ignition

Hi,

When I got to work this morning I turned the ignition off as normal, but noticed that the radio and sat nav didn't turn off.

I think that the radio normally stayed on until I opened the door?

When I lock the key with the keycard the radio/satnav goes off.

It all re-starts normally when I start the car.

Has anyone experienced this problem before?

Any suggestions where I should start fault finding?

Many thanks

Matthew

2007 Espace - Radio/Sat nav doesn't turn off with the ignition