Anyone else had this issue?

When I am listening to the media player or aux input on my Columbus unit, and I cancel the TP announcement after it kicks in, subsequent switching to the radio yields no signal, on any station/band. The issue is only rectified by a reset of the unit, and is annoying me to the point I have disabled the TP announcements. It is as if the radio signal is deactivated by cancelling the TP from within the media player.

Anyone else experienced this and if so, would you know why it occurs?

Thanks

Adam