diff --git a/src/scroll-timeline-css.js b/src/scroll-timeline-css.js
index 5007da01..c0033229 100644
--- a/src/scroll-timeline-css.js
+++ b/src/scroll-timeline-css.js
@@ -159,11 +159,4 @@ export function initCSSPolyfill() {
       }
     });
   });
-
-  // Clear cache containing the ProxyAnimation instances when leaving the page.
-  // See https://github.com/flackr/scroll-timeline/issues/146#issuecomment-1698159183
-  // for details.
-  window.addEventListener('pagehide', (e) => {
-    proxyAnimations = new WeakMap();
-  }, false);
 }