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@biarittz
Might not be your forks, could just be your bars. If your bars are not tightly secured they move slightly when significant sharp force is put on them. This noise is incredible and sounds exactly like plastic/carbon cracking. It happened to me when I rebuilt a bike and it shit me right up. I took out the forks repeatedly but could not find an issue,but the noise still occured each time I hit a bump. I found I could make it happen at will by standing over the bike, raising the front and forcibly bringing it down (at a non-fork breaking magnitude).
Took my whip to Bike Magic who were amazed. They found no fault and decided just to tighten everything. Issue solved. They said Charge Plugs or summin had a similar issue which causes concern to new owners, can't remember the full details.
Balmain on a TNRC had the same issue last year. I heard the noise, we tightened his bars and it was sorted.