Hi new here as i just bought my first discovery, TD5 gs (2000), previous car 2.5 Pajero, now towing like i should

When I start the car the radio comes on , I switch the radio off then after a few more seconds it comes on again, then it stays off.
It does this every time you start the car.

not a problem more of an irritation

Am i missing a setting that I can do to stop this occuring??

any advice

 

Its sounds like a bad radio switch.