General Stereo keeps playing after my car is turned off

[hahahabee]

I’m not sure why, but my stereo keeps playing after my keys are out of the ignition. Does anyone have a work around for this? I have the OEM stereo to a 2013 fiat 500c

 

[ChrisSim]

I have the original radio in my Alfa Giullietta and in the settings it is possible to set the length of time the radio remains"on" after the ignition is switched off fro zero to about 30 minutes. This is probably your issue.