Engine restart only if key has been removed completely before

Hello everyone I’ve been the owner of a new Volvo S40 2D for a few days. I chose the inexpensive diesel variant because it attracted my attention due to low consumption and low exhaust emissions. The drive variant didn’t work for me, because I hardly even drive in the city with traffic lights. However, I got used to stopping the engine when waiting at the traffic lights and starting again at Green. I now have a the engine did not start again when I turned the key from II to III. I could not start the engine. There was a huge casserole at the intersection because my brand new Volvo didn’t start. After endless attempts the engine jumped on and I was able to continue. I was able to adjust this situation several times later. A new start of the engine is only possible after I completely pulled the key and at least 50- When I then approached my Volvo dealer about this process, he said that this was so well known and was due to the “radio supply of the immobilizer”. If someone could detect a similar behavior or I have a problem with the technology here. If I pull the key completely off and hold “on the stretched arm” briefly in the rear of the car, I can start the engine immediately. I have not heard anything like this yet, although my car was not running until now. The car also had an immobilizer. It’s a bit strange the thing. Confused greetings from the new Volvo S40