diff --git a/plugins/sentinel/dashboard.html b/plugins/sentinel/dashboard.html
index 7ec3d10..cea2964 100644
--- a/plugins/sentinel/dashboard.html
+++ b/plugins/sentinel/dashboard.html
@@ -321,8 +321,7 @@
           }
           grid.appendChild(card);
           _cardCache[id] = card;
-          if (isRow) {
-            if (_chartInstances[id]) { _chartInstances[id] = null; }
+          if (isRow && !_chartInstances[id]) {
             try {
               _chartInstances[id] = { cpu: null, mem: null, net: null };
               if (typeof MiniChart !== 'undefined') {
@@ -332,6 +331,7 @@
                 _chartInstances[id].net = new DualLineChart(id+'-net', '#bb9af7', '#c0a8f0');
                 
               }
+            } catch(e) {}
           }
         }
 
@@ -374,6 +374,7 @@
               if (charts.cpu) charts.cpu.update(cpuVal);
               if (charts.mem) charts.mem.update(memVal);
               if (charts.net) { charts.net.update(net.rx_bytes_sec||0, net.tx_bytes_sec||0); if (charts.net.maxVal < 102400) charts.net.maxVal = 102400; }
+            } catch(e) {}
           }
           // 更新额外指标
           var loadEl = card.querySelector('.load-val');