Hello, i haven't asked a question in these forums for a decade now but I'm back again

After the recent Halo 2 and halo 3 sapien release I've been modding through the campaign again and had a blast, however I've noticed that some of the enemy spawns/encounters that are placed doesn't spawn. One example is 3 flood juggernauts in quarantine zone and plenty of other spawns that doesn't seem to work. High charity has a lot of unused encounters.

Is there any way to activate these encounters? I've checked the spawn count and they're not set at 0.
Or perhaps...
Is a script from scratch necessary to make for these encounters to spawn/work?