Funny noise when starting Kia Rio 1.0 T GDI Automatic

Hello guys, have a Kia Rio 1.0 Turbo GDI Automat. Platinum Edition. First registration 11/18 (new car) Now to the facts: If I drive the car normally warm and start again 1 hour later (not always), really comes a noise where you might think the engine flies away) In several workshops I was assured that this has to do with the hydraulic control chain (control chain tensioner). This loses in the hour the oil, which runs back into the engine. St If you then type the car within the next 1-2 hours, the viscosity of the oil is still so thin that the chain tensioner has to be cut completely with oil. With longer service life, the oil becomes firmer, so that there is still a little oil in the tensioner and there is no noise. Have you also had experience with it? Seems to be normal and not only in the motorization of the Rio. Lg Dominic