Water plugin - Movable water bodies?


Has anyone experience changing the water bodies at runtime? I am trying to change the location/shape of the coastline during the game.

I have tried setting the console variable r.Water.WaterMesh.ForceRebuildMeshPerFrame as suggested in this video, but it doesn’t seem to change anything.
I tried both changing the location of the WaterBodyOcean as well as changing the location of individual spline points, but the water mesh stays the same.

Any help would be appreciated.