diff --git a/application/Espo/Core/Api/RequestWrapper.php b/application/Espo/Core/Api/RequestWrapper.php
index bc58918498..83a5e9df5c 100644
--- a/application/Espo/Core/Api/RequestWrapper.php
+++ b/application/Espo/Core/Api/RequestWrapper.php
@@ -162,7 +162,7 @@ class RequestWrapper implements ApiRequest
             $this->initParsedBody();
         }
 
-        return $this->parsedBody;
+        return Util::cloneObject($this->parsedBody);
     }
 
     protected function initParsedBody()
diff --git a/application/Espo/Core/Api/Util.php b/application/Espo/Core/Api/Util.php
new file mode 100644
index 0000000000..5884b6b64a
--- /dev/null
+++ b/application/Espo/Core/Api/Util.php
@@ -0,0 +1,69 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM - Open Source CRM application.
+ * Copyright (C) 2014-2021 Yurii Kuznietsov, Taras Machyshyn, Oleksii Avramenko
+ * Website: https://www.espocrm.com
+ *
+ * EspoCRM is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * EspoCRM is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with EspoCRM. If not, see http://www.gnu.org/licenses/.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Core\Api;
+
+use StdClass;
+
+class Util
+{
+    public static function cloneObject(StdClass $source) : StdClass
+    {
+        $cloned = (object) [];
+
+        foreach (get_object_vars($source) as $k => $v) {
+            $cloned->$k = self::cloneObjectItem($v);
+        }
+
+        return $cloned;
+    }
+
+    private static function cloneObjectItem($item)
+    {
+        if (is_array($item)) {
+            $cloned = [];
+
+            foreach ($item as $v) {
+                $cloned[] = self::cloneObjectItem($v);
+            }
+
+            return $cloned;
+        }
+
+        if ($item instanceof StdClass) {
+            return self::cloneObject($item);
+        }
+
+        if (is_object($item)) {
+            return clone $item;
+        }
+
+        return $item;
+    }
+}
diff --git a/tests/unit/Espo/Core/Api/RequestTest.php b/tests/unit/Espo/Core/Api/RequestTest.php
index 14e07cad4a..344677c7a3 100644
--- a/tests/unit/Espo/Core/Api/RequestTest.php
+++ b/tests/unit/Espo/Core/Api/RequestTest.php
@@ -31,6 +31,7 @@ namespace tests\unit\Espo\Core\Api;
 
 use Psr\Http\Message\{
     ServerRequestInterface as Psr7Request,
+    StreamInterface,
 };
 
 use Espo\Core\Api\RequestWrapper;
@@ -112,4 +113,73 @@ class RequestTest extends \PHPUnit\Framework\TestCase
 
         $this->assertEquals('2', $request->get('id'));
     }
+
+    protected function createRequestWithBody(string $contents) : RequestWrapper
+    {
+        $body = $this->createMock(StreamInterface::class);
+
+        $body
+            ->expects($this->any())
+            ->method('getContents')
+            ->willReturn($contents);
+
+        $this->request
+            ->expects($this->any())
+            ->method('getBody')
+            ->willReturn($body);
+
+        $this->request
+            ->expects($this->any())
+            ->method('hasHeader')
+            ->with('Content-Type')
+            ->willReturn(true);
+
+        $this->request
+            ->expects($this->any())
+            ->method('getHeader')
+            ->with('Content-Type')
+            ->willReturn(['application/json']);
+
+        return new RequestWrapper($this->request);
+    }
+
+    public function testGetParsedBody()
+    {
+        $original = (object) [
+            'key1' => '1',
+            'key2' => (object) [
+                'key21' => [
+                    '211',
+                    '212',
+                    (object) [
+                        '2111' => '1',
+                    ],
+                ],
+            ],
+            'key3' => [
+                '31',
+                '32',
+                null,
+            ],
+            'key4' => null,
+        ];
+
+        $contents = json_encode($original);
+
+        $request = $this->createRequestWithBody($contents);
+
+        $parsed = $request->getParsedBody();
+
+        $anotherParsed = $request->getParsedBody();
+
+        $this->assertEquals($parsed, $original);
+
+        $this->assertEquals($parsed, $anotherParsed);
+
+        $this->assertNotSame($parsed, $anotherParsed);
+
+        $this->assertNotSame($parsed->key2, $anotherParsed->key2);
+
+        $this->assertNotSame($parsed->key2->key21[2], $anotherParsed->key2->key21[2]);
+    }
 }