BL Scening Custom campaign map navmesh not appearing when updated to 1.8.0

[Queresius Mutus]

Hello TW, unfortunatedly my custom campaign map, when opened in editor 1.8.0 do not show any navmesh when i hit the navmesh button. I already rolled back to 1.7.2, checked it again, played in game, updated again to 1.8.0 but they still do not show up. I revalidated tools files, but also the same. I dont anymore what to do, other peoples navmeshes are showing up on the update. I would love to listen some solution.

Thanks!