Anyone else experience a thud or as the service department described it as a "doink" noise while accelerating after warming up? This noise only occurs once on initial acceleration and at no other time while driving. Subaru claims the noise is normal, but I've never heard of this. It is highly concerning considering the car is barley 3 months old and didn't make the noise during the first couple weeks. I let the car warm up and the cold light turn off, give it another minute or so and accelerate. Within 2-3 seconds you can hear the noise from the front passenger side of the engine. Had it at the dealership for about a month looking into it, Subaru engineer shows up from corporate, tests the car and claims it's a normal noise.