I just recently bought the xs 10 and havent used it much it's still new. I noticed that when shooting 4k and DCI 4k there's a lite flicking sound that sound like a fan or something that comes from the front near the lense mount or even in the lens. I also heard this during playback when testing the internal mic. This sound does not happen when shooting FHD and I'm wondering is it because shooting 4k is more taxing on the Camera or the Lense. When I take the lense of and record with the sensor cap on the camera the sound is gone. is this normal or is this a fault and If its a fault can it be fixed or should I send the camera back. Thanks