On my 2019 179 I have an undermount metal sink. There have been posts on the forum of the joint between the sink and counter top leaking causing moisture to pernitrate the counter top and also causing the sink to become detached from the counter top. The sink falls into the cupboard while traveling and anything left in the sink while traveling is all over the place. A couple of mods, first reinstall the sink on top of the counter (making it an above mounted sink) and seal the top mounting so water will not run under the sink's lip. Or what I chose to do is brace the sink from underneath with wood attached to the sides of the cabinetry and replace the silicone between the sink's lip and the bottom of the counter. Lastly put a bead of silicone around the joint where the counter top cut out meets the sink's lip. That bead of silicone had loosened up on mine before I did my repair.
Hope this helps