I have two ramps each leading to a raised box and the navmesh isn’t detecting this raised box but detects the ramps that are connected to it. I tried rebuilding and nothing happens. Could someone point me in the right direction on what to do?
Have you made sure the objects come within the navmesh bounds? I just made this to test it out for you and it works fine. Just make sure your navmesh bounds are big enough to include them in. Take a look at the content examples and open the level navmesh and go to the 3rd room and you can see.
Here’s pictures of what I tried out.
Hope I helped, if not take a screenshot of your scene and show me I could try helping you out. 
Cheers.
Doh, that’s why it’s not appearing, thanks!
Cheers mate.