diff --git a/2-ui/99-ui-misc/01-mutation-observer/article.md b/2-ui/99-ui-misc/01-mutation-observer/article.md
index 2a3f3790..18af777f 100644
--- a/2-ui/99-ui-misc/01-mutation-observer/article.md
+++ b/2-ui/99-ui-misc/01-mutation-observer/article.md
@@ -244,6 +244,7 @@ These methods can be used together, like this:
 
 ```js
 // get a list of unprocessed mutations
+// should be called before disconnecting if you care about possibly unhandled recent mutations
 let mutationRecords = observer.takeRecords();
 
 // stop tracking changes