diff --git a/packages/rrweb/src/record/observer.ts b/packages/rrweb/src/record/observer.ts
index 6066f2f9ae..3091642db1 100644
--- a/packages/rrweb/src/record/observer.ts
+++ b/packages/rrweb/src/record/observer.ts
@@ -1197,7 +1197,9 @@ function initCustomElementObserver({
               name,
             },
           });
-        } catch (e) {}
+        } catch (e) {
+          console.warn(`Custom element callback failed for ${name}`);
+        }
         return original.apply(this, [name, constructor, options]);
       };
     },