BSPs do not update when converted to blocking volumes

If a bsp is converted to a blocking volume, the faces of the bsp remain present until a new actor is placed or geometry is compiled.

1. Open editor (any project)
2. Open modes>placement>bsp>place bsp box into level
3. Select bsp>details>convert>blocking volume

Results:

Faces of bsp brush are still present and visible. Building geometry and/or placing a new actor removes faces.

Expected:

Faces of bsp brush are removed from blocking volume.