Fixed #24400 Issues Found on Grid Multi-Select Column

app/code/Magento/Customer/Test/Mftf/Section/AdminCustomerGridSection.xml

@@ -13,6 +13,7 @@
         <element name="firstRowEditLink" type="text" selector="tr[data-repeat-index='0'] .action-menu-item" timeout="30"/>
         <element name="gridRow" type="text" selector="//*[@data-role='sticky-el-root']/parent::div/parent::div/following-sibling::div//tbody//*[@class='data-row'][{{row}}]" parameterized="true"/>
         <element name="selectFirstRow" type="checkbox" selector="//td[@class='data-grid-checkbox-cell']"/>
+        <element name="firstRowCheckbox" type="checkbox" selector="//tr[contains(@data-repeat-index, '0')]//input[@type='checkbox']"/>
         <element name="customerCheckboxByEmail" type="checkbox" selector="//tr[@class='data-row' and //div[text()='{{customerEmail}}']]//input[@type='checkbox']" parameterized="true" timeout="30"/>
         <element name="customerEditLinkByEmail" type="text" selector="//tr[@class='data-row' and //div[text()='{{customerEmail}}']]//a[@class='action-menu-item']" parameterized="true" timeout="30"/>
         <element name="customerGroupByEmail" type="text" selector="//tr[@class='data-row' and //div[text()='{{customerEmail}}']]//div[text()='{{customerGroup}}']" parameterized="true"/>

app/code/Magento/Ui/Test/Mftf/Test/AdminGridSelectAllCheckboxTest.xml

@@ -0,0 +1,36 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+ /**
+  * Copyright © Magento, Inc. All rights reserved.
+  * See COPYING.txt for license details.
+  */
+-->
+
+<tests xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:mftf:Test/etc/testSchema.xsd">
+    <test name="AdminGridSelectAllCheckboxTest">
+        <annotations>
+            <stories value="Select All Rows in Grid"/>
+            <title value="Select All Rows Grid ans unselect row"/>
+            <description value="Test for check selected rows in Grid and Select All selector"/>
+            <group value="ui"/>
+        </annotations>
+        <before>
+            <actionGroup ref="LoginAsAdmin" stepKey="loginAsAdmin"/>
+            <createData entity="Simple_US_Customer" stepKey="createCustomer1"/>
+            <createData entity="Simple_US_Customer" stepKey="createCustomer2"/>
+        </before>
+        <after>
+            <deleteData createDataKey="createCustomer1" stepKey="deleteCustomer1"/>
+            <deleteData createDataKey="createCustomer2" stepKey="deleteCustomer2"/>
+            <actionGroup ref="AdminLogoutActionGroup" stepKey="logout"/>
+        </after>
+        <amOnPage url="{{AdminCustomerPage.url}}" stepKey="openCustomerPage"/>
+        <waitForPageLoad stepKey="waitForCustomerPage"/>
+        <actionGroup ref="AdminSelectAllCustomers" stepKey="selectAllCustomers1"/>
+        <seeCheckboxIsChecked selector="{{AdminCustomerGridSection.firstRowCheckbox}}" stepKey="checkFirstCheckboxIsChecked"/>
+        <click selector="{{AdminCustomerGridSection.selectFirstRow}}" stepKey="unselectFirstRow"/>
+        <dontSeeCheckboxIsChecked selector="{{AdminCustomerGridSection.firstRowCheckbox}}" stepKey="checkFirstCheckboxIsUnchecked"/>
+        <actionGroup ref="AdminSelectAllCustomers" stepKey="selectAllCustomers2"/>
+        <seeCheckboxIsChecked selector="{{AdminCustomerGridSection.firstRowCheckbox}}" stepKey="reCheckFirstCheckboxIsChecked"/>
+    </test>
+</tests>

app/code/Magento/Ui/view/base/web/js/grid/columns/multiselect.js

@@ -235,7 +235,7 @@ define([
         * @returns {Multiselect} Chainable.
         */
         togglePage: function () {
-            return this.isPageSelected() ? this.deselectPage() : this.selectPage();
+            return this.isPageSelected() && !this.excluded().length ? this.deselectPage() : this.selectPage();
         },
 
         /**