NavMesh between meshed only create jumps in downward direction

Hi all,

I’m creating a level where will exit small portions of toxic water.
I created the map using a blender and water surface is a different mesh than the land.

Sooo i have a enemy that i want him be able to walck using land and water, but the links between the meshes are only created in one direction:



If this is not the appropriate way to implement this, I’m open to suggestions.