Navmesh: Build at runtime Config not saving

Hi guys. I’m working with a runtime procedural generated level. The instancing with the collisions totally work. When I build the navmesh, and save as default the project setting → runtime → rebuilt at runtime. For some reason: It’s not activated once I re-launch or open my project. It unchecks automatically.

Anyone run into this?

Nevermind me, 4.2 solved this issue.