Static Mesh Missing Nav Collision

Really strange issue I’ve ran into. I just imported a Static Mesh into my project no different from other static meshes. However this one mesh I have imported has not got any Nav Collision Data. The Nav Collision box is blank and says none. Other meshes on the other hand have extra options. Not sure what is wrong. Seems something on Import is causing the nav collision not to be generated.

I’ve checked my FBX options they are the same. Don’t think it is an issue with export.

Restarting the editor fixed this. Strange error.

+1 for the “restarting the editor”

I just lost 2 hours with this problem!