So it’s only this particular map that is causing swarm agent to not build lighting and all other maps build lighting correctly?
If that’s the case, it may just be a corrupted map that needs to be replaced. You can go to File > Export > save a .t3d file > Create a new map > File > Import > and select the .t3d file you just created.
This will place any objects in the scene that were in the other map.
This may be an option to get around the map not building lighting.