diff --git a/Assets/Mirror/Components/InterestManagement/Distance/DistanceInterestManagement.cs b/Assets/Mirror/Components/InterestManagement/Distance/DistanceInterestManagement.cs
index 89bc9845f..116051b8a 100644
--- a/Assets/Mirror/Components/InterestManagement/Distance/DistanceInterestManagement.cs
+++ b/Assets/Mirror/Components/InterestManagement/Distance/DistanceInterestManagement.cs
@@ -32,7 +32,7 @@ public override bool OnCheckObserver(NetworkIdentity identity, NetworkConnection
             return Vector3.Distance(identity.transform.position, newObserver.identity.transform.position) < range;
         }
 
-        public override void OnRebuildObservers(NetworkIdentity identity, HashSet<NetworkConnectionToClient> newObservers, bool initialize)
+        public override void OnRebuildObservers(NetworkIdentity identity, HashSet<NetworkConnectionToClient> newObservers)
         {
             // cache range and .transform because both call GetComponent.
             int range = GetVisRange(identity);
diff --git a/Assets/Mirror/Components/InterestManagement/Match/MatchInterestManagement.cs b/Assets/Mirror/Components/InterestManagement/Match/MatchInterestManagement.cs
index 65ae6d4b1..ff2eadc13 100644
--- a/Assets/Mirror/Components/InterestManagement/Match/MatchInterestManagement.cs
+++ b/Assets/Mirror/Components/InterestManagement/Match/MatchInterestManagement.cs
@@ -137,7 +137,7 @@ public override bool OnCheckObserver(NetworkIdentity identity, NetworkConnection
             return identityNetworkMatch.matchId == newObserverNetworkMatch.matchId;
         }
 
-        public override void OnRebuildObservers(NetworkIdentity identity, HashSet<NetworkConnectionToClient> newObservers, bool initialize)
+        public override void OnRebuildObservers(NetworkIdentity identity, HashSet<NetworkConnectionToClient> newObservers)
         {
             if (!identity.TryGetComponent<NetworkMatch>(out NetworkMatch networkMatch))
                 return;
diff --git a/Assets/Mirror/Components/InterestManagement/Scene/SceneInterestManagement.cs b/Assets/Mirror/Components/InterestManagement/Scene/SceneInterestManagement.cs
index 94638b22c..8cbfa3bb8 100644
--- a/Assets/Mirror/Components/InterestManagement/Scene/SceneInterestManagement.cs
+++ b/Assets/Mirror/Components/InterestManagement/Scene/SceneInterestManagement.cs
@@ -94,7 +94,7 @@ public override bool OnCheckObserver(NetworkIdentity identity, NetworkConnection
             return identity.gameObject.scene == newObserver.identity.gameObject.scene;
         }
 
-        public override void OnRebuildObservers(NetworkIdentity identity, HashSet<NetworkConnectionToClient> newObservers, bool initialize)
+        public override void OnRebuildObservers(NetworkIdentity identity, HashSet<NetworkConnectionToClient> newObservers)
         {
             if (!sceneObjects.TryGetValue(identity.gameObject.scene, out HashSet<NetworkIdentity> objects))
                 return;
diff --git a/Assets/Mirror/Components/InterestManagement/SpatialHashing/SpatialHashingInterestManagement.cs b/Assets/Mirror/Components/InterestManagement/SpatialHashing/SpatialHashingInterestManagement.cs
index b02c9e75c..eb4c2c562 100644
--- a/Assets/Mirror/Components/InterestManagement/SpatialHashing/SpatialHashingInterestManagement.cs
+++ b/Assets/Mirror/Components/InterestManagement/SpatialHashing/SpatialHashingInterestManagement.cs
@@ -52,7 +52,7 @@ public override bool OnCheckObserver(NetworkIdentity identity, NetworkConnection
             return (projected - observerProjected).sqrMagnitude <= 2;
         }
 
-        public override void OnRebuildObservers(NetworkIdentity identity, HashSet<NetworkConnectionToClient> newObservers, bool initialize)
+        public override void OnRebuildObservers(NetworkIdentity identity, HashSet<NetworkConnectionToClient> newObservers)
         {
             // add everyone in 9 neighbour grid
             // -> pass observers to GetWithNeighbours directly to avoid allocations
diff --git a/Assets/Mirror/Components/InterestManagement/Team/TeamInterestManagement.cs b/Assets/Mirror/Components/InterestManagement/Team/TeamInterestManagement.cs
index 3fe284bf4..22a8eb017 100644
--- a/Assets/Mirror/Components/InterestManagement/Team/TeamInterestManagement.cs
+++ b/Assets/Mirror/Components/InterestManagement/Team/TeamInterestManagement.cs
@@ -1,5 +1,4 @@
-using System;
-using System.Collections.Generic;
+using System.Collections.Generic;
 using UnityEngine;
 
 namespace Mirror
@@ -145,7 +144,7 @@ public override bool OnCheckObserver(NetworkIdentity identity, NetworkConnection
             return identityNetworkTeam.teamId == newObserverNetworkTeam.teamId;
         }
 
-        public override void OnRebuildObservers(NetworkIdentity identity, HashSet<NetworkConnectionToClient> newObservers, bool initialize)
+        public override void OnRebuildObservers(NetworkIdentity identity, HashSet<NetworkConnectionToClient> newObservers)
         {
             // If this object doesn't have a NetworkTeam then it's visible to all clients
             if (!identity.TryGetComponent<NetworkTeam>(out NetworkTeam networkTeam))
diff --git a/Assets/Mirror/Runtime/InterestManagement.cs b/Assets/Mirror/Runtime/InterestManagement.cs
index ae53c6379..ab149c324 100644
--- a/Assets/Mirror/Runtime/InterestManagement.cs
+++ b/Assets/Mirror/Runtime/InterestManagement.cs
@@ -54,7 +54,7 @@ public virtual void Reset() {}
         //
         // Mirror maintains .observing automatically in the background. best of
         // both worlds without any worrying now!
-        public abstract void OnRebuildObservers(NetworkIdentity identity, HashSet<NetworkConnectionToClient> newObservers, bool initialize);
+        public abstract void OnRebuildObservers(NetworkIdentity identity, HashSet<NetworkConnectionToClient> newObservers);
 
         // helper function to trigger a full rebuild.
         // most implementations should call this in a certain interval.
diff --git a/Assets/Mirror/Runtime/NetworkServer.cs b/Assets/Mirror/Runtime/NetworkServer.cs
index 95c5644a5..c8dfbc129 100644
--- a/Assets/Mirror/Runtime/NetworkServer.cs
+++ b/Assets/Mirror/Runtime/NetworkServer.cs
@@ -1442,7 +1442,7 @@ static void RebuildObserversCustom(NetworkIdentity identity, bool initialize)
             // not force hidden?
             if (identity.visible != Visibility.ForceHidden)
             {
-                aoi.OnRebuildObservers(identity, newObservers, initialize);
+                aoi.OnRebuildObservers(identity, newObservers);
             }
 
             // IMPORTANT: AFTER rebuilding add own player connection in any case