ENGCOM-5387: Fixed issue #23383 #23500

Author: sivaschenko

app/code/Magento/Catalog/Test/Mftf/Section/AdminProductFormSection.xml

@@ -79,6 +79,7 @@
         <element name="sectionHeader" type="button" selector="div[data-index='websites']" timeout="30"/>
         <element name="sectionHeaderOpened" type="button" selector="[data-index='websites']._show" timeout="30"/>
         <element name="website" type="checkbox" selector="//label[contains(text(), '{{var1}}')]/parent::div//input[@type='checkbox']" parameterized="true"/>
+        <element name="websiteChecked" type="checkbox" selector="//label[contains(text(), '{{var1}}')]/parent::div//input[@type='checkbox'][@value='1']" parameterized="true"/>
     </section>
     <section name="ProductDesignSection">
         <element name="DesignTab" type="button" selector="//strong[@class='admin__collapsible-title']//span[text()='Design']"/>

app/code/Magento/Catalog/Ui/DataProvider/Product/Form/Modifier/Websites.php

@@ -175,11 +175,9 @@ protected function getFieldsForFieldset()
         $label = __('Websites');
 
         $defaultWebsiteId = $this->websiteRepository->getDefault()->getId();
-        $isOnlyOneWebsiteAvailable = count($websitesList) === 1;
         foreach ($websitesList as $website) {
             $isChecked = in_array($website['id'], $websiteIds)
-                || ($defaultWebsiteId == $website['id'] && $isNewProduct)
-                || $isOnlyOneWebsiteAvailable;
+                || ($defaultWebsiteId == $website['id'] && $isNewProduct);
             $children[$website['id']] = [
                 'arguments' => [
                     'data' => [