S90 D5 noise when starting the cold engine

[Vojtonus]

Hi All,
I have got a problem with my S90 D5 2018.
When I switch on the cold engine after longer stay it makes knocking noise and vibration, it continues when I drive for few miles when I am stopping and engine stop and start. Once warm you cannot hear it anymore.
Volvo service cannot diagnose it for nearly 1.5 year. Once they say they hear something when I am making test drive with them, then when I am leaving the car for further checks they say they cannot hear anything wrong even if they know it is happening with cold engine only and I leave car with them for few days.
I recorded short video for them to have some record of the issue and show them where the problem is.
Please see it on https://drive.google.com/file/d/1BMj...w?usp=drivesdk

Let me know if you have any ideas what it can be.

Thank you in advance.