diff --git a/web/app/components/share/text-generation/result/__tests__/workflow-stream-handlers.spec.ts b/web/app/components/share/text-generation/result/__tests__/workflow-stream-handlers.spec.ts
index 8785e77d1e..4c3f1f7652 100644
--- a/web/app/components/share/text-generation/result/__tests__/workflow-stream-handlers.spec.ts
+++ b/web/app/components/share/text-generation/result/__tests__/workflow-stream-handlers.spec.ts
@@ -196,6 +196,7 @@ describe('workflow-stream-handlers helpers', () => {
       id: 'iter-trace-2',
       node_id: 'iter-1',
       status: NodeRunningStatus.Succeeded,
+      details: undefined,
     }))
     const loopNextProcess = appendParallelNext(iterFinishedProcess, createTrace({
       id: 'loop-trace-2',
@@ -205,6 +206,7 @@ describe('workflow-stream-handlers helpers', () => {
       id: 'loop-trace-2',
       node_id: 'loop-1',
       status: NodeRunningStatus.Succeeded,
+      details: undefined,
     }))
 
     expect(loopFinishedProcess.tracing[0]).toEqual(expect.objectContaining({
diff --git a/web/app/components/share/text-generation/result/workflow-stream-handlers.ts b/web/app/components/share/text-generation/result/workflow-stream-handlers.ts
index d4ea59d51e..ef8418f9fa 100644
--- a/web/app/components/share/text-generation/result/workflow-stream-handlers.ts
+++ b/web/app/components/share/text-generation/result/workflow-stream-handlers.ts
@@ -93,8 +93,11 @@ const finishParallelTrace = (current: WorkflowProcess | undefined, data: NodeTra
     draft.expand = true
     const traceIndex = findParallelTraceIndex(draft.tracing, data)
     if (traceIndex > -1) {
+      const currentTrace = draft.tracing[traceIndex]
       draft.tracing[traceIndex] = {
+        ...currentTrace,
         ...data,
+        details: data.details ?? currentTrace.details,
         expand: !!data.error,
       }
     }