diff --git a/src/js/select2/dropdown/attachBody.js b/src/js/select2/dropdown/attachBody.js
index 1ef2373c..ca41a9dc 100644
--- a/src/js/select2/dropdown/attachBody.js
+++ b/src/js/select2/dropdown/attachBody.js
@@ -195,7 +195,7 @@ define([
       left: 0
     };
 
-    if ($.contains(document.body, $offsetParent[0])) {
+    if ($.contains(document.body, $offsetParent[0]) || $offsetParent[0].isConnected) {
       parentOffset = $offsetParent.offset();
     }