Merge remote-tracking branch 'origin/AC-2020' into Spartans_2_4_6_Quality_Backlog

Author: glo82145

app/code/Magento/Ui/view/base/web/js/dynamic-rows/dynamic-rows.js

@@ -801,7 +801,7 @@ define([
             var max = 0,
                 pos;
 
-            this.elems.each(function (record) {
+            this.recordData.each(function (record) {
                 pos = ~~record.position;
                 pos > max ? max = pos : false;
             });