JS-338: [Configurable.JS] Do not reload full image set when 'First by First' is enabled

Author: anastasiiabuniak

app/code/Magento/ConfigurableProduct/view/frontend/web/js/configurable.js

@@ -253,11 +253,15 @@ define([
          * @private
          */
         _changeProductImage: function () {
-            var images = this.options.spConfig.images[this.simpleProduct],
-                initialImages = this.options.mediaGalleryInitial,
+            var images,
+                initialImages = $.extend(true, [], this.options.mediaGalleryInitial),
                 galleryObject = $(this.options.mediaGallerySelector).data('gallery'),
                 updateGallery;
 
+            if (this.options.spConfig.images[this.simpleProduct]) {
+                images = $.extend(true, [], this.options.spConfig.images[this.simpleProduct]);
+            }
+
             updateGallery = function (imagesArr) {
                 var mainImg = imagesArr.filter(function (img) {
                     return img.isMain;

lib/web/mage/gallery/gallery.js

@@ -453,7 +453,7 @@ define([
                         var images = [];
 
                         _.each(this.fotorama.data, function (item) {
-                            images.push(_.omit(item, '$navThumbFrame', '$navDotFrame', '$stageFrame'));
+                            images.push(_.omit(item, '$navThumbFrame', '$navDotFrame', '$stageFrame', 'labelledby'));
                         });
 
                         return images;