ARecastNavMesh.bPerformVoxelFiltering doesn't seem to be working

ARecastNavMesh.bPerformVoxelFiltering doesn't seem to be working anymore.

In the editor in any map

1. Place a NavMeshBoundsVolume in the map and rotate it to 45 degrees
2. Build navmesh (or let the automatic navmesh generation to finish) - make sure navmesh debug drawing is enabled
3. Observe the navmesh filling NavMeshBoundsVolume AABB, not just the volume's contents
4. Set ARecastNavMesh.bPerformVoxelFiltering property to true

Observed: navmesh still fills the volume's AABB

Expected: the navmesh is constrained to the inside of the volume