diff --git a/modules/OB/module.luau b/modules/OB/module.luau
index bea62b9..536aaac 100755
--- a/modules/OB/module.luau
+++ b/modules/OB/module.luau
@@ -9,7 +9,7 @@ local function duplicate(query: jecs.Query<...any>): jecs.CachedQuery<...any>
 	local world = (query :: jecs.Query<any> & { world: World }).world
 	local dup = world:query()
 	dup.filter_with = table.clone(query.filter_with)
-	if query.filter_without then 
+	if query.filter_without then
 		dup.filter_without = query.filter_without
 	end
 	return dup:cached()
@@ -152,11 +152,6 @@ local function monitors_new(query: jecs.Query<...any>): Monitor
 
 	local entity_index = world.entity_index :: any
 
-	local terms_lookup: { [jecs.Id<any>]: boolean } = {}
-	for _, term in terms do
-		terms_lookup[term] = true
-	end
-
 	local callback_added: ((jecs.Entity) -> ())?
 	local callback_removed: ((jecs.Entity) -> ())?
 
@@ -176,7 +171,7 @@ local function monitors_new(query: jecs.Query<...any>): Monitor
 		local r = jecs.entity_index_try_get_fast(
 			entity_index, entity :: any) :: jecs.Record
 		if not archetypes[oldarchetype.id] and archetypes[r.archetype.id] then
-			if last_old_archetype == oldarchetype and last_entity == entity and terms_lookup[id] then
+			if last_old_archetype == oldarchetype and last_entity == entity then
 				return
 			end
 
@@ -193,13 +188,13 @@ local function monitors_new(query: jecs.Query<...any>): Monitor
 		if callback_removed == nil then
 			return
 		end
-		
+
 		local r = jecs.record(world, entity)
 		if not r then return end
-		
+
 		local src = r.archetype
 		if not src then return end
-		
+
 		if not archetypes[src.id] then return end
 
 		if last_entity == entity and last_old_archetype == src then
@@ -232,7 +227,7 @@ local function monitors_new(query: jecs.Query<...any>): Monitor
 					entity_index, entity :: any) :: jecs.Record
 
 				if not archetypes[oldarchetype.id] and archetypes[r.archetype.id] then
-					if last_old_archetype == oldarchetype and last_entity == entity and terms_lookup[id] then
+					if last_old_archetype == oldarchetype and last_entity == entity then
 						return
 					end
 
@@ -253,10 +248,17 @@ local function monitors_new(query: jecs.Query<...any>): Monitor
 				end
 
 				local r = jecs.record(world, entity)
-				if archetypes[r.archetype.id] then
-					last_old_archetype = nil
-					callback_removed(entity)
+				local src = r.archetype
+
+				if last_entity == entity and last_old_archetype == src then
+					return
 				end
+				if not archetypes[src.id] then
+					return
+				end
+				last_entity = entity
+				last_old_archetype = src
+				callback_removed(entity)
 			end)
 			table.insert(cleanup, onadded)
 			table.insert(cleanup, onremoved)
@@ -294,7 +296,7 @@ local function monitors_new(query: jecs.Query<...any>): Monitor
 						callback_removed(entity)
 					end
 				end)
-				local onremoved = world:removed(rel, function(entity, id, delete)
+				local onremoved = world:removed(rel, function(entity: jecs.Entity, id: jecs.Id, delete)
 					if delete then
 						return
 					end
@@ -310,7 +312,7 @@ local function monitors_new(query: jecs.Query<...any>): Monitor
 					if not archetype then
 						return
 					end
-					if last_old_archetype == archetype and terms_lookup[id] then
+					if last_old_archetype == archetype then
 						return
 					end
 
diff --git a/test/ob.luau b/test/ob.luau
index d6a9bb0..cdabd06 100755
--- a/test/ob.luau
+++ b/test/ob.luau
@@ -309,19 +309,19 @@ TEST("modules/ob::monitor", function()
 		local A = world:component()
 		local B = world:component()
 		local C = world:component()
-		
+
 		local count = 0
-		ob.monitor(world:query(A, C)).removed(function() 
+		ob.monitor(world:query(A, C)).removed(function()
 			count += 1
 		end)
-		
+
 		local e = world:entity()
 		jecs.bulk_insert(world, e, {A, B}, {0,0})
 		CHECK(count==0)
 		world:remove(e, A)
 		CHECK(count==0)
 	end
-	
+
 	do CASE [[should not invoke monitor.added callback multiple times in a bulk_move
 	]]
 		local A = world:component()
@@ -838,27 +838,47 @@ TEST("modules/ob::monitor", function()
 	do CASE "monitor with wildcard pair should handle bulk_insert"
 		local A = world:component()
 		local B = world:component()
-		local e1 = world:entity()
-		local e2 = world:entity()
-		local e3 = world:entity()
+		local C = world:component()
+		local Relation = world:component()
+		local entity1 = world:entity()
+		local entity = world:entity()
 
-		local monitor = ob.monitor(world:query(A, jecs.pair(B, jecs.w)))
+		local monitor = ob.monitor(world:query(A, B, C, jecs.pair(Relation, jecs.w)))
 		local c = 0
 		monitor.added(function()
 			c += 1
 		end)
 
-		local e = world:entity()
-		world:add(e, A)
-		CHECK(c == 0)
-		world:add(e, jecs.pair(B, e1))
-		CHECK(c == 1)
-		world:add(e, jecs.pair(B, e2))
-		CHECK(c == 1)
-		world:add(e, jecs.pair(B, e3))
+		jecs.bulk_insert(world, entity, { A, B, C, jecs.pair(Relation, entity1) }, { 1, 2, 3, 4 })
 		CHECK(c == 1)
 	end
 
+	do CASE "monitor with wildcard pair: bulk_remove reports removed exactly once"
+		local A = world:component()
+		local B = world:component()
+		local C = world:component()
+		local Relation = world:component()
+		local entity1 = world:entity()
+		local entity = world:entity()
+
+		local monitor = ob.monitor(world:query(A, B, C, jecs.pair(Relation, jecs.w)))
+		local added_count = 0
+		local removed_count = 0
+		monitor.added(function()
+			added_count += 1
+		end)
+		monitor.removed(function()
+			removed_count += 1
+		end)
+
+		jecs.bulk_insert(world, entity, { A, B, C, jecs.pair(Relation, entity1) }, { 1, 2, 3, 4 })
+		CHECK(added_count == 1)
+		CHECK(removed_count == 0)
+
+		jecs.bulk_remove(world, entity, { A, B, C, jecs.pair(Relation, entity1) })
+		CHECK(removed_count == 1)
+	end
+
 	do CASE "monitor with multiple pairs should handle separate operations correctly"
 		local A = world:component()
 		local B = world:component()