diff --git a/platform_web/components/ServerConfigEditor.test.tsx b/platform_web/components/ServerConfigEditor.test.tsx
new file mode 100644
index 0000000..80d3a86
--- /dev/null
+++ b/platform_web/components/ServerConfigEditor.test.tsx
@@ -0,0 +1,83 @@
+/** @vitest-environment jsdom */
+
+import { act, useState } from "react";
+import { createRoot, type Root } from "react-dom/client";
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
+
+import type { ServerFileWorkspaceResponse, ServerInstanceResponse } from "../api/types";
+import type { OperationTracker } from "../stores/operations";
+import { ServerConfigEditor } from "./ServerConfigEditor";
+
+const apiMocks = vi.hoisted(() => ({
+  getServerFileReadSnapshot: vi.fn(),
+  getServerFileWorkspace: vi.fn(),
+  readServerFile: vi.fn()
+}));
+
+vi.mock("../api/client", () => ({ platformApiClient: apiMocks }));
+
+const instance = { id: "server-1", name: "SCUM Alpha" } as ServerInstanceResponse;
+const workspace = {
+  serverInstanceId: "server-1",
+  pluginId: "game.scum",
+  defaultDirectoryKey: "scum-config",
+  directories: [{ key: "scum-config", label: "服务器配置", scope: "config" }],
+  files: [{ key: "scum-server-settings", directoryKey: "scum-config", label: "ServerSettings.ini", kind: "config", editable: true }],
+  configFields: [],
+  transfer: { channel: "run-file-transfer", uploadChunkSizeBytes: 1, downloadChunkSizeBytes: 1, maxInlineEditBytes: 64, maxBrowserUploadBytes: 64, notes: [] },
+  declaredOnly: true
+} as ServerFileWorkspaceResponse;
+
+let root: Root | null = null;
+let container: HTMLDivElement | null = null;
+
+(globalThis as typeof globalThis & { IS_REACT_ACT_ENVIRONMENT: boolean }).IS_REACT_ACT_ENVIRONMENT = true;
+
+beforeEach(() => {
+  vi.useFakeTimers();
+  apiMocks.getServerFileWorkspace.mockResolvedValue(workspace);
+  let snapshotCalls = 0;
+  apiMocks.getServerFileReadSnapshot.mockImplementation(async () => {
+    snapshotCalls += 1;
+    return snapshotCalls === 1 ? { serverInstanceId: "server-1", pluginId: "game.scum", key: "scum-server-settings", state: "not-read" } : { serverInstanceId: "server-1", pluginId: "game.scum", key: "scum-server-settings", state: "ready", content: "[General]\nscum.MaxPlayers=63\n", version: 1, checksum: "sha256:test" };
+  });
+  apiMocks.readServerFile.mockResolvedValue({ status: "queued", serverInstanceId: "server-1", pluginId: "game.scum", operation: "read", key: "scum-server-settings", job: { id: "job-read", state: "queued" } });
+});
+
+afterEach(async () => {
+  if (root) await act(async () => root?.unmount());
+  container?.remove();
+  root = null;
+  container = null;
+  vi.clearAllMocks();
+  vi.useRealTimers();
+});
+
+describe("ServerConfigEditor", () => {
+  it("does not restart the same snapshot request when operation state rerenders the parent", async () => {
+    container = document.createElement("div");
+    document.body.append(container);
+    root = createRoot(container);
+
+    function Wrapper() {
+      const [, rerender] = useState(0);
+      const operations: OperationTracker = {
+        operations: [],
+        begin: () => { rerender((value) => value + 1); return "operation-read"; },
+        update: () => undefined,
+        succeed: () => undefined,
+        fail: () => undefined,
+        isPending: () => false
+      };
+      return <ServerConfigEditor instance={instance} operations={operations} requester="Operator" onClose={() => undefined} />;
+    }
+
+    await act(async () => root?.render(<Wrapper />));
+    await act(async () => { await Promise.resolve(); });
+    await act(async () => { await vi.advanceTimersByTimeAsync(500); });
+    await act(async () => { await Promise.resolve(); });
+
+    expect(apiMocks.readServerFile).toHaveBeenCalledTimes(1);
+    expect(apiMocks.getServerFileReadSnapshot).toHaveBeenCalledTimes(2);
+  });
+});
diff --git a/platform_web/components/ServerConfigEditor.tsx b/platform_web/components/ServerConfigEditor.tsx
index aa266f3..94e59e7 100644
--- a/platform_web/components/ServerConfigEditor.tsx
+++ b/platform_web/components/ServerConfigEditor.tsx
@@ -1,5 +1,5 @@
 import { Code2, FileCog, Save, X } from "lucide-react";
-import { useCallback, useEffect, useMemo, useState } from "react";
+import { useCallback, useEffect, useMemo, useRef, useState } from "react";
 
 import { platformApiClient } from "../api/client";
 import type { DeclaredFileReadSnapshotResponse, PluginConfigFieldResponse, PluginLogicalFileResponse, ServerFileWorkspaceResponse, ServerInstanceResponse } from "../api/types";
@@ -27,21 +27,27 @@ export function ServerConfigEditor({ instance, operations, requester, onClose }:
   const [saving, setSaving] = useState(false);
   const [message, setMessage] = useState("");
   const [error, setError] = useState("");
+  const readInFlightRef = useRef("");
+  const operationsRef = useRef(operations);
+  operationsRef.current = operations;
 
   const configFiles = useMemo(() => (workspace?.files ?? []).filter((file) => file.kind === "config" && file.editable !== false), [workspace]);
   const selectedFile = configFiles.find((file) => file.key === selectedKey) ?? configFiles[0];
   const fields = useMemo(() => (workspace?.configFields ?? []).filter((field) => field.fileKey === selectedFile?.key), [selectedFile?.key, workspace?.configFields]);
 
   const readSelectedFile = useCallback(async (file: PluginLogicalFileResponse) => {
+    const readKey = `${instance.id}:${file.key}`;
+    if (readInFlightRef.current === readKey) return;
+    readInFlightRef.current = readKey;
     setLoading(true);
     setError("");
     setMessage("正在通过 Run 读取配置文件…");
     try {
       let next = await platformApiClient.getServerFileReadSnapshot(instance.id, file.key);
       if (next.state !== "ready") {
-        const operationId = operations.begin({ intent: "读取服务器配置", targetKind: "config", targetId: instance.id, requester });
+        const operationId = operationsRef.current.begin({ intent: "读取服务器配置", targetKind: "config", targetId: instance.id, requester });
         const dispatch = await platformApiClient.readServerFile(instance.id, { key: file.key, idempotencyKey: configOperationKey("read", instance.id, file.key) });
-        operations.succeed(operationId, `配置读取任务 ${dispatch.job.id} 已派发`, dispatch.job);
+        operationsRef.current.succeed(operationId, `配置读取任务 ${dispatch.job.id} 已派发`, dispatch.job);
         for (let attempt = 0; attempt < 60 && next.state !== "ready"; attempt += 1) {
           await new Promise((resolve) => window.setTimeout(resolve, 500));
           next = await platformApiClient.getServerFileReadSnapshot(instance.id, file.key);
@@ -59,8 +65,9 @@ export function ServerConfigEditor({ instance, operations, requester, onClose }:
       setMessage("");
     } finally {
       setLoading(false);
+      if (readInFlightRef.current === readKey) readInFlightRef.current = "";
     }
-  }, [fields, instance.id, operations, requester]);
+  }, [fields, instance.id, requester]);
 
   useEffect(() => {
     if (!workspace) {