Automatic, higher slip of the converter in the cold normal?

Hello together, unfortunately have only experience with newer automatic transmissions, therefore the precautionary question. It is noticeable that my newly bought V70 only has a significantly higher slip on the converter in the cold (e.g. overnight at below 3°C) after the start on the first few hundred meters than normal. In other words, the engine goes up to approx. 2500-2800U/min high to get away to some extent. Switching operations however as usual soft and almost imperceptible. After a few hundred meters the haunted v orbei and the automatic has already under 2000 rpm less slip and thus also more train. Gear oil flushing was just carried out Greetings Horst