I have created a bunker for my Chernarus server and i am trying to get zombies to spawn inside the bunker. My bunker is above vanilla ground and it spawns in completely fine.

My issue is i am trying to get zombies to spawn inside the bunker pieces and i am failing miserably. I have tried for over 4 hours using different y co ordinates. The zombies spawn but under the bunker on the vanilla surface. Do you have any pointers or a solution?

For example this is a snippet of my bunker piece and what i am trying to achieve.
This is my bunker entrance
{

    "name": "Land_Underground_Entrance",
    "pos": [
    141.651199,
    307.180145,
    8535.790039
  ],
    "ypr": [
    -179.999893,
    0,
    0
    ],
    "scale": 1,
    "enableCEPersistency": false
},

This is the zombie territory
<zone name="InfectedPolice" smin="0" smax="0" dmin="2" dmax="2" x="140.853" y="307.170" z="8547.58" r="1"/> <!--Bunker Enterance-->
I have also tried with:-
y="307.200"
y="307.300"
y="307.400"
y="307.500"

Each time the zombie spawns under the bunker piece instead of inside it.

I then tried with an event. The event piece spawned but the secondary infected didn't spawn inside, they spawned underneath.