When I go into video mode and record a video, there's this weird "clicking" or "clinking" sound coming from the IBIS (the hump part where the microphone is, which I believe is the IBIS). It sounds like a spring being pulled then released. However, it doesn't make any noise when I'm in the PASM modes and shooting photos. It only makes noises when I'm recording video. Even very slight movements in video mode would cause it to "clink", but doesn't make any noise in regular photo shooting modes. The clinking would go away if I switch off the IBIS. Is there something wrong with my OMD? Should I send it back to Olympus for a warranty repair?