bubulak

I have had quite weird experience recently with my 2015 Fiat Freemont 3,6 AWD. When in the mountains in Austria last week I kept receiving the Key Fob Battery Low message on the EVIC everytime I started the car. The strange thing was that it kept giving this message on both Key Fobs I have. Then the last day, it was difficult to remotely lock and unlock the car, I had to press the buttons several times. Then when I went out of the car with the key in my pocket to put the skiis in the trunk the EVIC started giving the Key has Left the Vehicle Mesage and when I returned back it did not stop as usual, I had to restart the car instead. Then I left the mountains and got back to Prague where I live and nothing happens anymore. The system works flawlessly as it did before the mountain trip. I also plugged in my OBDII reader and got the reading of the fault messages from the ECU - nothing. Any idea what this could be? First I thought that it could have been the low temperature in the mountains which required more power than usual. However, these days in Prague it is also freezing and nothing happens.