I'd ask on seabreeze. I did see an 18 review and it did remind me that some of their "eco friendly" constructions in those years had problematic durability. Probably worth looking at that as well.
Since freewaves can vary from year to year, good that you are specific with the year. I was shocked by how different 85l RRDs were between model years. One year was a pig to get planing but year before was fine due to different rocker line