diff --git a/src/IO.Ably.Shared/Realtime/Connection.cs b/src/IO.Ably.Shared/Realtime/Connection.cs
index b96324df2..5eae16db9 100644
--- a/src/IO.Ably.Shared/Realtime/Connection.cs
+++ b/src/IO.Ably.Shared/Realtime/Connection.cs
@@ -209,7 +209,7 @@ public string CreateRecoveryKey()
         ///     message and, in the failed state in particular, provides diagnostic
         ///     error information.
         /// </summary>
-        public ErrorInfo ErrorReason => InnerState.ErrorReason;
+        public ErrorInfo ErrorReason => InnerState.ErrorReason; // RTN15c7
 
         /// <summary>
         /// Gets the currently used Host.
diff --git a/src/IO.Ably.Shared/Realtime/Workflows/RealtimeState.cs b/src/IO.Ably.Shared/Realtime/Workflows/RealtimeState.cs
index 36c6366bd..07515f861 100644
--- a/src/IO.Ably.Shared/Realtime/Workflows/RealtimeState.cs
+++ b/src/IO.Ably.Shared/Realtime/Workflows/RealtimeState.cs
@@ -87,10 +87,6 @@ public void Update(ConnectionInfo info)
                 }
             }
 
-            // RTN16d
-            public bool IsResumed(ConnectionInfo info) =>
-                Key.IsNotEmpty() && Id == info.ConnectionId;
-
             public void ClearKeyAndId()
             {
                 Id = string.Empty;
diff --git a/src/IO.Ably.Shared/Realtime/Workflows/RealtimeWorkflow.cs b/src/IO.Ably.Shared/Realtime/Workflows/RealtimeWorkflow.cs
index 6a312e321..b3968b941 100644
--- a/src/IO.Ably.Shared/Realtime/Workflows/RealtimeWorkflow.cs
+++ b/src/IO.Ably.Shared/Realtime/Workflows/RealtimeWorkflow.cs
@@ -599,10 +599,12 @@ private void HandleConnectedCommand(SetConnectedStateCommand cmd)
         {
             var info = new ConnectionInfo(cmd.Message);
 
-            var isConnectionResumeOrRecoverAttempt = State.Connection.Key.IsNotEmpty() || Client.Options.Recover.IsNotEmpty(); // recover will only be used during init, resume will be used for all subsequent requests
-            var resumeOrRecoverSuccess = State.Connection.IsResumed(info) && cmd.Message.Error == null; // RTN15c6
+            // recover is used when set via clientOptions#recover initially, resume will be used for all subsequent requests.
+            var isConnectionResumeOrRecoverAttempt = State.Connection.Key.IsNotEmpty() || Client.Options.Recover.IsNotEmpty();
 
-            State.Connection.Update(info);
+            var resumeOrRecoverSuccess = State.Connection.Id == info.ConnectionId && cmd.Message.Error == null; // RTN15c6, RTN16d
+
+            State.Connection.Update(info); // RTN16d, RTN15e
 
             if (info.ClientId.IsNotEmpty())
             {
@@ -615,7 +617,7 @@ private void HandleConnectedCommand(SetConnectedStateCommand cmd)
                 cmd.IsUpdate,
                 Logger);
 
-            SetState(connectedState);
+            SetState(connectedState); // RTN15c7 - if error, set on connection and part of emitted connected event
 
             Client.Options.Recover = null; // RTN16k, explicitly setting null so it won't be used for subsequent connection requests
 
diff --git a/src/IO.Ably.Tests.Shared/Realtime/ConnectionSpecs/ConnectionSpecs.cs b/src/IO.Ably.Tests.Shared/Realtime/ConnectionSpecs/ConnectionSpecs.cs
index b7f1ac8fa..ebfd6c110 100644
--- a/src/IO.Ably.Tests.Shared/Realtime/ConnectionSpecs/ConnectionSpecs.cs
+++ b/src/IO.Ably.Tests.Shared/Realtime/ConnectionSpecs/ConnectionSpecs.cs
@@ -1,4 +1,5 @@
-using FluentAssertions;
+using System.IO;
+using FluentAssertions;
 using System.Threading.Tasks;
 using Xunit;
 using Xunit.Abstractions;
@@ -19,14 +20,12 @@ public async Task RecoveryKey_MsgSerialShouldNotBeSentToAblyButShouldBeSetOnConn
                 transport => transport.OnConnectChangeStateToConnected = false;
             var client = GetClientWithFakeTransport(options => { options.Recover = recoveryKey; });
 
-            await Task.Delay(9000);
-            client.Connection.MessageSerial.Should().Be(45);
-
             var transportParams = await client.ConnectionManager.CreateTransportParameters("https://realtime.ably.io");
             var paramsDict = transportParams.GetParams();
             paramsDict.ContainsKey("recover").Should().BeTrue();
             paramsDict["recover"].Should().Be("uniqueKey");
             paramsDict.ContainsKey("msg_serial").Should().BeFalse();
+            client.Connection.MessageSerial.Should().Be(45);
         }
 
         public ConnectionSpecs(ITestOutputHelper output)