diff --git a/libraries/microsoft-agents-hosting-core/microsoft_agents/hosting/core/app/typing_indicator.py b/libraries/microsoft-agents-hosting-core/microsoft_agents/hosting/core/app/typing_indicator.py
index a99ddc30..9c9a967f 100644
--- a/libraries/microsoft-agents-hosting-core/microsoft_agents/hosting/core/app/typing_indicator.py
+++ b/libraries/microsoft-agents-hosting-core/microsoft_agents/hosting/core/app/typing_indicator.py
@@ -124,7 +124,7 @@ def __init__(
         self._stopped: bool = False
         self._hook_registered: bool = False
 
-    async def __aenter__(self) -> "TypingIndicator":
+    async def __aenter__(self) -> TypingIndicator:
         self.start()
         return self
 
diff --git a/libraries/microsoft-agents-hosting-core/microsoft_agents/hosting/core/channel_service_adapter.py b/libraries/microsoft-agents-hosting-core/microsoft_agents/hosting/core/channel_service_adapter.py
index 6cbc700f..cd57a5c8 100644
--- a/libraries/microsoft-agents-hosting-core/microsoft_agents/hosting/core/channel_service_adapter.py
+++ b/libraries/microsoft-agents-hosting-core/microsoft_agents/hosting/core/channel_service_adapter.py
@@ -69,12 +69,19 @@ async def send_activities(
             raise ValueError("send_activities: activities list cannot be empty")
 
         responses = []
+        buffered_reply_activities = []
 
         for activity in activities:
             activity.id = None
 
             response = ResourceResponse()
 
+            buffer_replies = (
+                context.activity.delivery_mode == DeliveryModes.expect_replies
+            )
+            if buffer_replies:
+                buffered_reply_activities.append(activity)
+
             if activity.type == ActivityTypes.invoke_response:
                 context.turn_state[self.INVOKE_RESPONSE_KEY] = activity
             elif (
@@ -83,7 +90,7 @@ async def send_activities(
             ):
                 # no-op
                 pass
-            else:
+            elif not buffer_replies:
                 connector_client = context.services.get(ConnectorClientBase)
                 if not connector_client:
                     raise RuntimeError(
@@ -110,6 +117,8 @@ async def send_activities(
 
             responses.append(response)
 
+        if buffered_reply_activities:
+            context.buffered_reply_activities.extend(buffered_reply_activities)
         return responses
 
     async def update_activity(self, context: TurnContext, activity: Activity):
diff --git a/libraries/microsoft-agents-hosting-core/microsoft_agents/hosting/core/turn_context.py b/libraries/microsoft-agents-hosting-core/microsoft_agents/hosting/core/turn_context.py
index f0d596aa..ddbeaea5 100644
--- a/libraries/microsoft-agents-hosting-core/microsoft_agents/hosting/core/turn_context.py
+++ b/libraries/microsoft-agents-hosting-core/microsoft_agents/hosting/core/turn_context.py
@@ -12,7 +12,6 @@
     Activity,
     ActivityTypes,
     ConversationReference,
-    DeliveryModes,
     InputHints,
     Mention,
     ResourceResponse,
@@ -47,9 +46,6 @@ def __call__(self) -> Awaitable[T]: ...
 
 
 class TurnContext(TurnContextProtocol):
-    # Same constant as in the BF Adapter, duplicating here to avoid circular dependency
-    _INVOKE_RESPONSE_KEY = "TurnContext.InvokeResponse"
-
     _activity: Activity
 
     _on_send_activities: list[OnSendActivitiesHandler]
@@ -203,7 +199,6 @@ async def send_activities(
         self, activities: list[Activity]
     ) -> list[ResourceResponse]:
         sent_non_trace_activity = False
-        # TODO: Check activity serialization
         ref = self.activity.get_conversation_reference()
 
         with spans.TurnContextSendActivities(self):
@@ -229,23 +224,6 @@ def activity_validator(activity: Activity) -> Activity:
             # send activities through adapter
             async def logic() -> list[ResourceResponse]:
                 nonlocal sent_non_trace_activity
-
-                if self.activity.delivery_mode == DeliveryModes.expect_replies:
-                    responses = []
-                    for activity in output:
-                        self.buffered_reply_activities.append(activity)
-                        # Ensure the TurnState has the InvokeResponseKey, since this activity
-                        # is not being sent through the adapter, where it would be added to TurnState.
-                        if activity.type == ActivityTypes.invoke_response:
-                            self.turn_state[TurnContext._INVOKE_RESPONSE_KEY] = activity
-
-                        responses.append(ResourceResponse())
-
-                    if sent_non_trace_activity:
-                        self.responded = True
-
-                    return responses
-
                 responses = await self.adapter.send_activities(self, output)
                 if sent_non_trace_activity:
                     self.responded = True
diff --git a/tests/hosting_core/test_channel_service_adapter.py b/tests/hosting_core/test_channel_service_adapter.py
index 805a0782..3530c77a 100644
--- a/tests/hosting_core/test_channel_service_adapter.py
+++ b/tests/hosting_core/test_channel_service_adapter.py
@@ -2,6 +2,7 @@
 
 from microsoft_agents.activity import (
     Activity,
+    ActivityTypes,
     ConversationResourceResponse,
     ConversationParameters,
     DeliveryModes,
@@ -160,6 +161,30 @@ async def callback(context: TurnContext):
         assert context_arg.services.get(UserTokenClientBase) is user_token_client
         assert not context_arg.services.has(ConnectorClientBase)
 
+    @pytest.mark.asyncio
+    async def test_send_activities_buffers_expect_replies_without_connector(
+        self, adapter
+    ):
+        context = TurnContext(
+            adapter,
+            Activity(
+                type=ActivityTypes.message,
+                conversation={"id": "conversation123"},
+                channel_id="channel_id",
+                delivery_mode=DeliveryModes.expect_replies,
+            ),
+        )
+        activities = [
+            Activity(type=ActivityTypes.message, text="reply"),
+            Activity(type=ActivityTypes.typing),
+        ]
+
+        responses = await adapter.send_activities(context, activities)
+
+        assert len(responses) == 2
+        assert context.buffered_reply_activities == activities
+        assert not context.services.has(ConnectorClientBase)
+
     @pytest.mark.asyncio
     async def test_process_activity_normal_no_service_url(
         self, mocker, user_token_client, adapter