u/Waste-Conclusion-568

2019 VW Tiguan S 150,000 miles. Last year, I randomly noticed this "vacuum sound" coming on then going off when I opened my driver door. It only did it twice. I searched the interwebs for a while and only concluded a possible vacuum leak? But when I tried to have it diagnosed along with a few other issues by my mechanic, they had never heard of a car doing this when the driver door opens. And could not get it to duplicate. Well, it just did it again and I was able to catch it on video for the sound. Anyone know what this is? It has only ever done it randomly, no rhyme or reason.