diff --git a/ide/src/trace/component/SpSystemTrace.ts b/ide/src/trace/component/SpSystemTrace.ts
index 016e301479319ad1d9378fa7b0d734f6c9a2b1c7..dfc0f7b7a2b192c51c4f7ccbd349dc6be959d799 100644
--- a/ide/src/trace/component/SpSystemTrace.ts
+++ b/ide/src/trace/component/SpSystemTrace.ts
@@ -1794,11 +1794,11 @@ export class SpSystemTrace extends BaseElement {
       ev.stopPropagation();
       return;
     }
+    this.isMouseLeftDown = false;
     if (ev.ctrlKey) {
       ev.preventDefault();
       this.offsetMouse = 0;
-      this.mouseCurrentPosition = 0;
-      this.isMouseLeftDown = false;
+      this.mouseCurrentPosition = 0; 
       this.style.cursor = 'default';
       return;
     }