so embarassing

code/modules/projectiles/projectile.dm

@@ -766,7 +766,7 @@
 //mobs use get_projectile_hit_chance instead of get_projectile_hit_boolean
 
 /mob/living/proc/get_projectile_hit_chance(obj/projectile/P)
-	if((body_position == LYING_DOWN || HAS_TRAIT(TRAIT_NESTED)) && src != P.original)
+	if((body_position == LYING_DOWN || HAS_TRAIT(src, TRAIT_NESTED)) && src != P.original)
 		return FALSE // Snowflake check for xeno nests, because we want bullets to fly through even though they're standing in it
 	var/ammo_flags = P.ammo.flags_ammo_behavior | P.projectile_override_flags
 	if(ammo_flags & AMMO_XENO)