diff --git a/src/composables/useMonitorLive.js b/src/composables/useMonitorLive.js
index bfd9d37..2cdc8b6 100644
--- a/src/composables/useMonitorLive.js
+++ b/src/composables/useMonitorLive.js
@@ -141,7 +141,8 @@ export function useMonitorLive({ getDockId, ui, getLivePlayer }) {
   }
 
   // 成功返回 true；失败抛错，由调用方决定是否 onPlayError（避免互相递归）
-  async function refreshPlayURL() {
+  // fromRetry: 播放错误触发的刷新不重置重试计数，避免无限重建
+  async function refreshPlayURL({ fromRetry = false } = {}) {
     if (!live.dockId || !live.session?.id) return false
     const sessionId = live.session.id
     const play = await getLivePlayURL(live.dockId, sessionId)
@@ -149,7 +150,7 @@ export function useMonitorLive({ getDockId, ui, getLivePlayer }) {
     live.playUrl = play.playUrl || ''
     const nowSec = Math.floor(Date.now() / 1000)
     live.playUrlExpiresAt = Number(play.expiresAt) || nowSec + PLAY_EXPIRE_FALLBACK_SEC
-    live.playRetryCount = 0
+    if (!fromRetry) live.playRetryCount = 0
     schedulePlayRefresh()
     return true
   }
@@ -172,9 +173,11 @@ export function useMonitorLive({ getDockId, ui, getLivePlayer }) {
     const delay = Math.max(5000, (Number(expiresAt) * 1000 - Date.now()) / 2)
     live.heartbeatTimer = window.setTimeout(async () => {
       if (!live.dockId || !live.session?.id) return
+      const dockId = live.dockId
+      const sessionId = live.session.id
       try {
-        const result = await heartbeatLive(live.dockId, live.session.id)
-        if (!live.session) return
+        const result = await heartbeatLive(dockId, sessionId)
+        if (!live.session || live.session.id !== sessionId || live.dockId !== dockId) return
         live.session = result.session
         scheduleLiveHeartbeat(result.leaseExpiresAt)
         if (result.session.phase === 'streaming' && !live.playUrl) {
@@ -185,6 +188,7 @@ export function useMonitorLive({ getDockId, ui, getLivePlayer }) {
           }
         }
       } catch (e) {
+        if (!live.session || live.session.id !== sessionId || live.dockId !== dockId) return
         ui.toast(e.message || '直播观看已结束')
         await closeLive(false)
       }
@@ -200,7 +204,7 @@ export function useMonitorLive({ getDockId, ui, getLivePlayer }) {
     }
     live.playRetryCount += 1
     try {
-      await refreshPlayURL()
+      await refreshPlayURL({ fromRetry: true })
     } catch (e) {
       if (live.playRetryCount >= PLAY_RETRY_MAX) {
         ui.toast(e?.message || err?.message || '播放失败')
@@ -232,6 +236,8 @@ export function useMonitorLive({ getDockId, ui, getLivePlayer }) {
       ['确认停止推流', '影响当前所有观看者']
     )
     if (!ok) return
+    // confirm 期间可能已关闭/切换会话，避免 stop 错 dock 或 wipe 新会话
+    if (!live.session || live.dockId !== dockId || live.session.id !== session.id) return
     try {
       await stopLive(dockId)
       resetLocal()