diff --git a/src/main/frontend/util.cljc b/src/main/frontend/util.cljc
index fd3724847..ff9ec008c 100644
--- a/src/main/frontend/util.cljc
+++ b/src/main/frontend/util.cljc
@@ -789,7 +789,10 @@
 #?(:cljs
    (defn get-blocks-noncollapse []
      (->> (d/by-class "ls-block")
-          (filter (fn [b] (not= "none" (d/style b "display")))))))
+          (filter (fn [b]
+                    (if-let [parent (gdom/getParentElement b)]
+                      (not= "none" (d/style parent "display"))
+                      false))))))
 
 ;; Take the idea from https://stackoverflow.com/questions/4220478/get-all-dom-block-elements-for-selected-texts.
 ;; FIXME: Note that it might not works for IE.