I know it’s been a while since the OP posted, but just wondered how you got on with Mavic. I’m having the same issue with my rear wheel which is a Mavic Allroad. It’s only noisy when coasting, so it must be the free hub. Googled it and apparently it is quite common with Mavic wheels. Awful design flaw if this horrendous clicking sound is “normal”. Never had this issue with the dozens of bikes I’ve ridden before.