XC40 2 zones Automatic air conditioning

Hello, I now have a XC40 D4 AWD automatic for a good 9 months, now in winter I have problems with the automatic climate control. The climate is set at 23°C on both sides, after approx.30 min drive the climate starts to cool down insanely, with several measurements it came out that the ventilation temperature is 13 – 15°C and the internal temperature sensor as well as the whole panel around there has a temperature of 30-35°C. Is that normal, at this temperature that comes out there it will be g anz nice cold! The feeler in the interior has already been changed, but did not result in any improvement. Does anyone have the same problem or solution? Thank you