NAV mesh not generating

Rebuild Navmesh does nothing for me atm. No % build up just straight OK after the click on the tool button without any Navmesh been generated.

Map is Seelow , battleareas are defined for both teams via Polybattlearea. spawns/objective are setup etc.

  • looks like there is an predefined square area on the different maps in which Navmesh will be build correctly.
    Anyone aware of a way to edit its properties and extend it fully to the borders of the map ?

Kinda stuck here, any Ideas/Tips ?