Hi guys, had this lens for a while now and used it very successfully on my Olympus OMD-EM1. However when I first used it, I got a horrible clicking noise from the aperture blades, which on the OMD I managed to sort by turning off flicker reduction. I recently purchased a Panasonic GX8 (which I love), but much to my dismay, this lens also clicks like mad on that too, which I was surprised at with both combos being Panasonic. I can't see a "flicker reduction" setting on the GX8, so is this noise something I have to live with, or is there a trick to sort it please ? Many thanks.