issue user is experiencing is that show navigation doesn't work in cooked builds. See UE-11779
USER DESCRIPTION: Every time I check "Enable Drawing" in project settings, save all, close the editor then open it again -> Enable Drawing is unchecked. Why? Is there some other place when this option can be overwritten?
To be sure it's not something specific to my project I've tried this in new blank project in 4.7.2 and it happens too.
Putting bEnableDrawing=True in defaultengine.ini does not work either.
Because of this I´m unable to debug the navmesh in packaged version of the game, "show navigation" command will never work.
1. Create a new project
2. Go into Project Settings>Navigation Mesh
3. Check on "Enable Drawing"
4. Save All
5. Close the project and reopen it
6. Look at the Enable Drawing setting
Head over to the existing Questions & Answers thread and let us know what's up.