diff --git a/ide/src/trace/component/SpSystemTrace.ts b/ide/src/trace/component/SpSystemTrace.ts
index 016e301479319ad1d9378fa7b0d734f6c9a2b1c7..46c8545e0cb11a6b0bb65ec733f4ddba5a706f21 100644
--- a/ide/src/trace/component/SpSystemTrace.ts
+++ b/ide/src/trace/component/SpSystemTrace.ts
@@ -1788,17 +1788,19 @@ export class SpSystemTrace extends BaseElement {
   };
 
   documentOnMouseUp = (ev: MouseEvent) => {
+    this.isMouseLeftDown = false;
+	
     if (!this.loadTraceCompleted || !this.mouseEventEnable) return;
     if (this.isWASDKeyPress()) {
       ev.preventDefault();
       ev.stopPropagation();
       return;
     }
+    
     if (ev.ctrlKey) {
       ev.preventDefault();
       this.offsetMouse = 0;
-      this.mouseCurrentPosition = 0;
-      this.isMouseLeftDown = false;
+      this.mouseCurrentPosition = 0; 
       this.style.cursor = 'default';
       return;
     }