AGMS

Hi, I have a 2016/2017 Connect which occasionally has a problem with the radio. Normally when I open the drivers door the radio will switch off, however there are times when the radio will not switch off when the door is opened. If I shut the door, lock the van, unlock the van the open the door the radio switches off, if I just close and open the door it doesn't switch off. Does anyone have any thoughts as to the cause/remedy? Cheers