maze navmesh problem.

when i make a large navmesh out of the maze i made with mesh_maze addon.When i zoom out and watch the npcs go through the maze.Everything in the maze will disappear after a while.Is that normal.I am using a python script to randomly select waypoints that i found on blenderartist.Is that normal.
could someone try it and see what i mean?

No code, no screenshots, no .blend file, not much info…

Please give us the means to do more than blind guesses.

Here is the blend.controls are z and x to rotate and w to move forwards.

Attachments

maze it.zip (1.25 MB)

all my openworld games go blank after a while as i play them.
what could be causing this?
Did anyone look at the blend?

Did anyone see what my problem was?