After doing the 6/4/19 R-Link update the radio will not switch off the TomTom icon is just repeating on screen.
I have just had this same experience on my Zoe. After three hours, the radio would not turn off, could not adjust volume, could not mute it. Continuous scrolling TomTom. Cable was plugged in and not charging. Removed cable and after an hour, radio and screen finally turned off. Upon turning on, live services were again working but not yet the time. But the car is in a garage with no GPS satellites so that will presumably come good later.