Weird Navmesh?

i was using the Free Animation Sample from epic games on UE5.5
i made my character and i made my ai to move random until it found me and start chasing me

but the navemesh gose like this idk why

for now:
i didnt found any real fix i just delete the navmesh and respawn it but i cant keep going in this way cuz my nav.settings take long to adjust

(sorry of my English i’ve tried my best)

What i tried:

  • moving, scalling, rotating it
  • change settings of it (Proxys links only)
  • placing boxes under/ubove/near it

Update!:

i keep gone with the map like nothing is happening, and i added/remove cubes
and that what i got:

that problem will make me crazy bruh