Change NavModifier's size inside an actor

I have these doors which can be unlocked by the player, but not the NPCs.


I gave them a collision, which detects if there are NPCs trying to go trough.
I gave the doors a NavModifier component, which will block navigation if the doors are locked and re-enable it once it’s not.
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The issue I’m having, is that the trigger which detects NPCs is counted towards NavModifier’s calculations of how much ground should be blocked.

Is there a way to change the dimensions or exclude the NPC trigger from being counted towards NavModifier’s size?