Unity 2018.3.1 - Terrain Draw Instanced (Terrain.drawInstanced) not render in release mode?

I’m creating terrains at run time (Terrain.CreateTerrainGameObject), then I get the Terrain component of each TerrainGameObject and enable drawInstanced (Terrain.drawInstanced). I see the terrains are rendered in Debug mode, but when I build & run the game in release mode, the terrains aren’t rendered. Is it a bug in Unity 2018.3.1?

yes for me they work in edtitor but not build. did u find a workaround?