diff --git a/pkg/agent/loop.go b/pkg/agent/loop.go
index a052da4ea..5c8a1e768 100644
--- a/pkg/agent/loop.go
+++ b/pkg/agent/loop.go
@@ -1354,17 +1354,16 @@ func (al *AgentLoop) runAgentLoop(ctx context.Context, agent *AgentInstance, opt
 		task.Result = utils.Truncate(finalContent, 280)
 	}
 
-	// 5e. Replace orphaned streaming status bubble for background tasks.
+	// 5e. Promote streaming status bubble to task message for background tasks.
 	// When SendResponse is false (e.g. heartbeat), no final non-status message
-	// triggers cleanup, so the last streaming chunk persists on Telegram.
+	// triggers preSend's statusMsgIDs.LoadAndDelete cleanup, so the last
+	// streaming chunk persists on Telegram. Move the tracked status message ID
+	// into taskMsgIDs so the defer's IsTaskStatus completion notification edits
+	// the existing bubble instead of creating a duplicate message.
 	if opts.Background && !opts.SendResponse && !constants.IsInternalChannel(opts.Channel) && task != nil &&
-		task.streamedChunks {
-		_ = al.bus.PublishOutbound(ctx, bus.OutboundMessage{
-			Channel:  opts.Channel,
-			ChatID:   opts.ChatID,
-			Content:  utils.Truncate(finalContent, 200),
-			IsStatus: true,
-		})
+		task.streamedChunks && opts.TaskID != "" {
+		statusKey := opts.Channel + ":" + opts.ChatID
+		al.channelManager.PromoteStatusToTask(statusKey, opts.TaskID)
 	}
 
 	// 6. Save final assistant message to session (deferred write-behind)
diff --git a/pkg/channels/manager.go b/pkg/channels/manager.go
index f6ba2c2cc..de1df78e3 100644
--- a/pkg/channels/manager.go
+++ b/pkg/channels/manager.go
@@ -839,6 +839,19 @@ func (m *Manager) runTTLJanitor(ctx context.Context) {
 	}
 }
 
+// PromoteStatusToTask moves the tracked streaming status message for the given
+// channel:chatID key into the task message map under taskID. This allows the
+// next IsTaskStatus publish to edit the streaming bubble instead of creating a
+// new message. Returns true if a status message was found and promoted.
+func (m *Manager) PromoteStatusToTask(statusKey, taskID string) bool {
+	v, loaded := m.statusMsgIDs.LoadAndDelete(statusKey)
+	if !loaded {
+		return false
+	}
+	m.taskMsgIDs.Store(taskID, v)
+	return true
+}
+
 func (m *Manager) GetChannel(name string) (Channel, bool) {
 	m.mu.RLock()
 	defer m.mu.RUnlock()