diff --git a/src/preload/backend.ts b/src/preload/backend.ts
index b2524e1..0084a7d 100644
--- a/src/preload/backend.ts
+++ b/src/preload/backend.ts
@@ -1,7 +1,7 @@
 import { ipcRenderer } from 'electron';
 import type { BackendControlCommand, BackendPageStatus, BackendTranscriptPayload } from '../backends/contracts';
 import { getBackendWebAdapter } from '../backends/web-registry';
-import { shouldClickMicrophoneOnCancel } from './speech-session-state';
+import { shouldClickMicrophoneOnCancel, shouldClickMicrophoneOnStop } from './speech-session-state';
 import { shouldFinishAfterStop } from './stop-completion';
 
 const backendId = process.argv
@@ -180,9 +180,7 @@ function stopSpeech(): void {
   if (!active || stopping || !adapter) return;
   stopping = true;
   const stoppedAt = Date.now();
-  const wasRecordingAtStop = adapter.isRecording(document);
-  adapter.findMicrophone(document)?.click();
-  diagnose('stop-clicked', { microphone: controlSnapshot(adapter.findMicrophone(document)) });
+  let stopClicked = false;
   const finish = (): void => {
     emitCurrentEditorText();
     resetSession();
@@ -192,11 +190,22 @@ function stopSpeech(): void {
   const checkCompletion = (): void => {
     if (!active || !stopping || !adapter) return;
     const now = Date.now();
+    const isRecording = adapter.isRecording(document);
+    if (shouldClickMicrophoneOnStop(isRecording, stopClicked)) {
+      const microphone = adapter.findMicrophone(document);
+      if (microphone) {
+        microphone.click();
+        stopClicked = true;
+        diagnose('stop-clicked', { microphone: controlSnapshot(adapter.findMicrophone(document)) });
+      }
+      stopTimer = setTimeout(checkCompletion, 75);
+      return;
+    }
     if (shouldFinishAfterStop({
       elapsedMs: now - stoppedAt,
       quietMs: now - lastTranscriptAt,
-      wasRecordingAtStop,
-      isRecording: adapter.isRecording(document),
+      stopClicked,
+      isRecording,
       ...adapter.stopCompletion
     })) {
       diagnose('stop-complete', { elapsedMs: now - stoppedAt });
@@ -206,7 +215,7 @@ function stopSpeech(): void {
     stopTimer = setTimeout(checkCompletion, 75);
   };
   clearTimeout(stopTimer);
-  stopTimer = setTimeout(checkCompletion, 75);
+  checkCompletion();
 }
 
 function cancelSpeech(): void {
diff --git a/src/preload/speech-session-state.ts b/src/preload/speech-session-state.ts
index a819dc3..ddd2f47 100644
--- a/src/preload/speech-session-state.ts
+++ b/src/preload/speech-session-state.ts
@@ -1,3 +1,7 @@
 export function shouldClickMicrophoneOnCancel(active: boolean, stopping: boolean): boolean {
   return active && !stopping;
 }
+
+export function shouldClickMicrophoneOnStop(isRecording: boolean, stopClicked: boolean): boolean {
+  return isRecording && !stopClicked;
+}
diff --git a/src/preload/stop-completion.ts b/src/preload/stop-completion.ts
index fd4abb5..2918725 100644
--- a/src/preload/stop-completion.ts
+++ b/src/preload/stop-completion.ts
@@ -1,7 +1,7 @@
 export interface StopCompletionInput {
   readonly elapsedMs: number;
   readonly quietMs: number;
-  readonly wasRecordingAtStop: boolean;
+  readonly stopClicked: boolean;
   readonly isRecording: boolean;
   readonly minimumWaitMs: number;
   readonly quietWindowMs: number;
@@ -9,7 +9,7 @@ export interface StopCompletionInput {
 }
 
 export function shouldFinishAfterStop(input: StopCompletionInput): boolean {
+  if (!input.stopClicked || input.isRecording) return false;
   if (input.elapsedMs >= input.timeoutMs) return true;
-  if (input.wasRecordingAtStop && input.isRecording) return false;
   return input.elapsedMs >= input.minimumWaitMs && input.quietMs >= input.quietWindowMs;
 }
diff --git a/test/speech-session-state.test.ts b/test/speech-session-state.test.ts
index fd2bd74..bbdea41 100644
--- a/test/speech-session-state.test.ts
+++ b/test/speech-session-state.test.ts
@@ -1,6 +1,6 @@
 import assert from 'node:assert/strict';
 import test from 'node:test';
-import { shouldClickMicrophoneOnCancel } from '../src/preload/speech-session-state';
+import { shouldClickMicrophoneOnCancel, shouldClickMicrophoneOnStop } from '../src/preload/speech-session-state';
 
 test('停止命令已经点击过麦克风后，取消不得再次点击并重新开启录音', () => {
   assert.equal(shouldClickMicrophoneOnCancel(true, true), false);
@@ -13,3 +13,12 @@ test('录音期间直接取消时仍应点击麦克风停止网页录音', () =>
 test('本地会话未激活时取消不得点击麦克风', () => {
   assert.equal(shouldClickMicrophoneOnCancel(false, false), false);
 });
+
+test('停止到达但网页尚未开始录音时不得再次点击开始按钮', () => {
+  assert.equal(shouldClickMicrophoneOnStop(false, false), false);
+});
+
+test('网页异步进入录音后只点击一次停止按钮', () => {
+  assert.equal(shouldClickMicrophoneOnStop(true, false), true);
+  assert.equal(shouldClickMicrophoneOnStop(true, true), false);
+});
diff --git a/test/stop-completion.test.ts b/test/stop-completion.test.ts
index 91ec8ea..611ddf4 100644
--- a/test/stop-completion.test.ts
+++ b/test/stop-completion.test.ts
@@ -5,7 +5,7 @@ import { shouldFinishAfterStop } from '../src/preload/stop-completion';
 const base = {
   elapsedMs: 700,
   quietMs: 500,
-  wasRecordingAtStop: true,
+  stopClicked: true,
   isRecording: false,
   minimumWaitMs: 250,
   quietWindowMs: 450,
@@ -16,6 +16,10 @@ test('网页仍在录音时不得提前提交', () => {
   assert.equal(shouldFinishAfterStop({ ...base, isRecording: true }), false);
 });
 
+test('尚未点击停止时不得提交', () => {
+  assert.equal(shouldFinishAfterStop({ ...base, stopClicked: false }), false);
+});
+
 test('网页结束且最终文本静默窗口满足时立即提交', () => {
   assert.equal(shouldFinishAfterStop(base), true);
 });
@@ -24,6 +28,10 @@ test('网页结束后仍有文本修正时继续等待', () => {
   assert.equal(shouldFinishAfterStop({ ...base, quietMs: 120 }), false);
 });
 
-test('网页状态未回切时由超时兜底结束', () => {
-  assert.equal(shouldFinishAfterStop({ ...base, elapsedMs: 4_500, isRecording: true }), true);
+test('网页仍在录音时超时也不得提交', () => {
+  assert.equal(shouldFinishAfterStop({ ...base, elapsedMs: 4_500, isRecording: true }), false);
+});
+
+test('网页已停止时超时可以结束静默等待', () => {
+  assert.equal(shouldFinishAfterStop({ ...base, elapsedMs: 4_500, quietMs: 120 }), true);
 });