MC-40586: Fixed updating wishlist

Author: engcom-Charlie

app/code/Magento/Wishlist/view/frontend/web/js/add-to-wishlist.js

@@ -118,12 +118,22 @@ define([
                 buttons = this._getAddToWishlistButton(event);
 
             buttons.each(function (index, element) {
-                var params = $(element).data('post');
+                var params = $(element).data('post'),
+                    currentTarget = event.currentTarget,
+                    targetElement,
+                    targetValue;
 
                 if (!params) {
                     params = {
                         'data': {}
                     };
+                } else if ($(currentTarget).data('selector') || $(currentTarget).attr('name')) {
+                    targetElement = self._getElementData(currentTarget);
+                    targetValue = Object.keys(targetElement)[0];
+
+                    if (params.data.hasOwnProperty(targetValue) && !dataToAdd.hasOwnProperty(targetValue)) {
+                        delete params.data[targetValue];
+                    }
                 }
 
                 params.data = $.extend({}, params.data, dataToAdd, {