Fix issue with no results on other than first search pages when using elasticsearch

app/code/Magento/Elasticsearch/Model/ResourceModel/Fulltext/Collection/SearchResultApplier.php

@@ -68,6 +68,10 @@ public function apply()
         foreach ($items as $item) {
             $ids[] = (int)$item->getId();
         }
+
+        $this->collection->setPageSize(null);
+        $this->collection->setCurPage(null);
+
         $this->collection->getSelect()->where('e.entity_id IN (?)', $ids);
         $orderList = join(',', $ids);
         $this->collection->getSelect()->reset(\Magento\Framework\DB\Select::ORDER);

app/code/Magento/Elasticsearch/Test/Unit/Model/ResourceModel/Fulltext/Collection/SearchResultApplierTest.php

@@ -0,0 +1,113 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+declare(strict_types=1);
+
+namespace Magento\Elasticsearch\Test\Unit\Model\ResourceModel\Fulltext\Collection;
+
+use Magento\CatalogSearch\Model\ResourceModel\Fulltext\Collection;
+use Magento\Elasticsearch\Model\ResourceModel\Fulltext\Collection\SearchResultApplier;
+use Magento\Framework\Api\Search\DocumentInterface;
+use Magento\Framework\Api\Search\SearchResultInterface;
+use Magento\Framework\DB\Select;
+use PHPUnit\Framework\MockObject\MockObject;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * Unit test for SearchResultApplier.
+ */
+class SearchResultApplierTest extends TestCase
+{
+    /**
+     * @var SearchResultApplier|MockObject
+     */
+    private $object;
+
+    /**
+     * @var Collection|MockObject
+     */
+    private $collection;
+
+    /**
+     * @var Select
+     */
+    private $select;
+
+    /**
+     * @var SearchResultInterface|MockObject
+     */
+    private $searchResult;
+
+    /**
+     * @var DocumentInterface|MockObject
+     */
+    private $document;
+
+    /**
+     * @var int
+     */
+    private $size;
+
+    /**
+     * @var int
+     */
+    private $currentPage;
+
+    protected function setUp(): void
+    {
+        $this->collection = $this->getMockBuilder(Collection::class)
+            ->disableOriginalConstructor()
+            ->getMock();
+
+        $this->select = $this->getMockBuilder(Select::class)
+            ->disableOriginalConstructor()
+            ->getMock();
+
+        $this->collection
+            ->method('getSelect')
+            ->willReturn($this->select);
+
+        $this->searchResult = $this->getMockBuilder(SearchResultInterface::class)
+            ->disableOriginalConstructor()
+            ->getMock();
+
+        $this->document = $this->getMockBuilder(DocumentInterface::class)
+            ->disableOriginalConstructor()
+            ->getMock();
+
+        $this->document
+            ->method('getId')
+            ->willReturn(123);
+
+        $this->searchResult
+            ->method('getItems')
+            ->willReturn([$this->document]);
+
+        $this->size = 10;
+        $this->currentPage = 1;
+
+        $this->object = new SearchResultApplier(
+            $this->collection,
+            $this->searchResult,
+            $this->size,
+            $this->currentPage
+        );
+    }
+
+    public function testApply(): void
+    {
+        $this->collection->expects($this->once())
+            ->method('setPageSize')
+            ->with(null)
+            ->willReturn($this->collection);
+
+        $this->collection->expects($this->once())
+            ->method('setCurPage')
+            ->with(null)
+            ->willReturn($this->collection);
+
+        $this->object->apply();
+    }
+}