I have a Fox Talus on the rear of an almost new Trek Liquid. It appears that the shock makes a slight clunking noise at the beginning of every compression stroke. Since it is bolted onto an aluminum frame, it is magnified to a "marble in a tin can " sound., one time only, at the beginning of every compression stroke. Is this a normal noise? It has done this since new, and is getting more annoying as time goes on.The shock seems to function okay otherwise, the same in any travel mode. Thanks.