diff --git a/pkg/agent/loop.go b/pkg/agent/loop.go
index e7229bb5a..694fb63c1 100644
--- a/pkg/agent/loop.go
+++ b/pkg/agent/loop.go
@@ -2102,7 +2102,7 @@ turnLoop:
 			reasoningContent = response.ReasoningContent
 		}
 		go al.handleReasoning(
-			turnCtx,
+			context.WithoutCancel(turnCtx),
 			reasoningContent,
 			ts.channel,
 			al.targetReasoningChannelID(ts.channel),