Why does navbuild start automatic over and over?

This problem has been going on for month. I have auto nav build turned off in the project settings and yet, after I load the project, sometimes in the middle of doing stuff it starts to rebuild the whole navmesh. Since it’s a large world this takes forever.
“Update navmesh automatically” in the level editor is also cleared, I’m not including a screenshot of that here.

Why does it do this and is there a way to disable this? If not it’s clearly a bug since it is turned off in the project settings