diff --git a/polygerrit-ui/app/elements/shared/gr-hovercard/gr-hovercard-behavior.ts b/polygerrit-ui/app/elements/shared/gr-hovercard/gr-hovercard-behavior.ts
index c4ebe1e..a3233be 100644
--- a/polygerrit-ui/app/elements/shared/gr-hovercard/gr-hovercard-behavior.ts
+++ b/polygerrit-ui/app/elements/shared/gr-hovercard/gr-hovercard-behavior.ts
@@ -137,6 +137,11 @@
         this.listen(this, 'mouseleave', 'unlock');
       }
 
+      detached() {
+        super.detached();
+        this.unlock();
+      }
+
       /** @override */
       ready() {
         super.ready();