Enemies falling through the floor

[ivcfjrrvfdoza457o8]

For some reason enemies are falling through the floor when they chase after me on my custom stages (stages that I've built). I don't think this is a bug as this doesn't happen in the lugaru campaign or any of the stages I've played that other people have made. How do I fix this and what's going on?

[Silverfish]

Maybe your floors are too thin? If you post the level maybe someone can take a look and see if they also have the issue and see if it can be solved.

[merlyn]

Make sure you've also have generated a nav mesh, so that enemies aren't doing strange pathing. See Top Bar -> Nav Mesh.