The device freezes the display during activity /cannot be operated while driving and recording activity/ or when saving activity. All connected devices such as radar work. The activity is saved only after the device is warmed up to room temperature and after several restarts of the device. This was the case with firmware 18.25 and 19.22. The problem has been described by several users on the Garmin forum. Only replacing the device will help and even that is a lottery whether it will work afterwards. According to observation, it always occurs at lower temperatures - driving 26.2. morning 5 degrees, 25.2.24 - 12 degrees. I.e. the fault does not manifest itself at room temperature - only when driving at lower temperatures.