Zones and portals do not work [Fixed]

I have noticed that zones and portals do not work (change the environment lighting) unless I have edited them.
When loading my map, these objects are essentially inactive. They are there, but going into the zone does not cause anything to happen.
Only once I go into the map editor and "update" the zone object by moving it around slightly, or doing some other modification to it will cause it to finally detect the player, and adjust the lighting accordingly.

What do I do about it? I am making a tunnel but the tunnel remains bright with this issue. I want to use the zones to make the tunnel dark when you go into it - the environment lighting changes to a darker version.

Zone object in place where the tunnel is:


Here is an example of inside the tunnel:

It looks like the right image before I try and update the zone in the map editor. After updating, it suddenly goes to the left one (the correct one).

 

oh so that's why the gridmap cave isn't darkening anymore