diff --git a/view/base/web/js/form/element/siglum.js b/view/base/web/js/form/element/siglum.js
index e9c938e..ec5cf8b 100755
--- a/view/base/web/js/form/element/siglum.js
+++ b/view/base/web/js/form/element/siglum.js
@@ -278,7 +278,7 @@ define([
             return selectedTorah[selectedGroup][this.parts.book]['chapters'];
         },
         renderSetChapter: function () {
-            const chapters = this.getCurrentChapters().toArray();
+            const chapters = utils.fixArray(this.getCurrentChapters());
             let buttons = Object
                     .keys(chapters)
                     .reduce(
diff --git a/view/base/web/js/verses/utils.js b/view/base/web/js/verses/utils.js
index 8145c20..952c675 100755
--- a/view/base/web/js/verses/utils.js
+++ b/view/base/web/js/verses/utils.js
@@ -143,6 +143,9 @@ define([
             }).done(function (data) {
                 callBack(data);
             });
+        },
+        fixArray: function (array) {
+            return JSON.parse(JSON.stringify(array));
         }
     };
 });