Detecting a mob in faction territory

To avoid any confusion: i'm talking about territory provided by the plugin MassiveCore/Factions in this topic.

I'm having a hard time keeping my mobs from spawning inside those. Apparently whenever i'm using the spawn point generation provided by MythicMobs with the ADD type, it will spawn mobs in factions territory regardless of flags being set there for mobs not spawning.

This is quite the issue for me. I do not consider this to be a MythicMobs "bug" ofc, because it's just not setup to...

Detecting a mob in faction territory