diff --git a/plugins/sentinel/dashboard.html b/plugins/sentinel/dashboard.html
index 861f22e..a95d875 100644
--- a/plugins/sentinel/dashboard.html
+++ b/plugins/sentinel/dashboard.html
@@ -276,11 +276,7 @@
             '<div style="font-size:.75rem;color:var(--text-dim)">↑ '+fmtSpeed(net.tx_bytes_sec||0)+'</div>';
           card.querySelector('.node-time').innerHTML = '<div style="font-size:.7rem;color:var(--text-dim);margin-top:8px">'+(n.last_seen ? new Date(n.last_seen*1000).toLocaleTimeString() : '—')+'</div>';
         } else {
-          // 网格模式
-          var oldCpu = parseFloat(body.getAttribute('data-cpu')||cpuVal);
-          var oldMem = parseFloat(body.getAttribute('data-mem')||memVal);
-          body.setAttribute('data-cpu', cpuVal);
-          body.setAttribute('data-mem', memVal);
+          // 网格模式 — oldCpu/oldMem 已在上面读取(在setAttribute之前)
           var hasMetricBar = body.querySelector('.metric-bar');
           var isNew = !body.querySelector('.cpu-val') || !hasMetricBar;
           if (isNew) {