diff --git a/framework/CHANGELOG.md b/framework/CHANGELOG.md
index 82e580d..ec37189 100644
--- a/framework/CHANGELOG.md
+++ b/framework/CHANGELOG.md
@@ -32,6 +32,7 @@ Yii Framework 2 Change Log
 - Bug #9046: Fixed problem with endless error loop when an error occurred after sending a stream or file download response to the user (cebe)
 - Bug #9059: Fixed PHP Notice in error handler view (dynasource, andrewnester, samdark)
 - Bug #9063: Workaround for MySQL losing table case when adding index (sebathi)
+- Bug #9091: `UrlManager::createUrl()` did not create correct url when defaults were used, internal cache is now skipped in certain situations (cebe)
 - Bug #9127, #9128: Fixed MSSQL `QueryBuilder::renameColumn()` and `QueryBuilder::renameTable()` escaping (sitawit)
 - Bug #9161: Fixed `yii\web\Request` ignore `queryParams` when resolve request (zetamen)
 - Bug: Fixed string comparison in `BaseActiveRecord::unlink()` which may result in wrong comparison result for hash valued primary keys starting with `0e` (cebe)
diff --git a/framework/web/UrlManager.php b/framework/web/UrlManager.php
index 49ccce0..3149efe 100644
--- a/framework/web/UrlManager.php
+++ b/framework/web/UrlManager.php
@@ -325,9 +325,16 @@ class UrlManager extends Component
             }
 
             if ($url === false) {
+                $cacheable = true;
                 foreach ($this->rules as $rule) {
+                    if (!empty($rule->defaults) && $rule->mode !== UrlRule::PARSING_ONLY) {
+                        // if there is a rule with default values involved, the matching result may not be cached
+                        $cacheable = false;
+                    }
                     if (($url = $rule->createUrl($this, $route, $params)) !== false) {
-                        $this->_ruleCache[$cacheKey][] = $rule;
+                        if ($cacheable) {
+                            $this->_ruleCache[$cacheKey][] = $rule;
+                        }
                         break;
                     }
                 }
diff --git a/tests/framework/web/UrlManagerTest.php b/tests/framework/web/UrlManagerTest.php
index 4a2097d..d4bb5a1 100644
--- a/tests/framework/web/UrlManagerTest.php
+++ b/tests/framework/web/UrlManagerTest.php
@@ -125,6 +125,26 @@ class UrlManagerTest extends TestCase
         $this->assertEquals('http://en.example.com/test/post/1/sample+post', $url);
         $url = $manager->createUrl(['post/index', 'page' => 1]);
         $this->assertEquals('/test/post/index?page=1', $url);
+
+        // create url with the same route but different params/defaults
+        $manager = new UrlManager([
+            'enablePrettyUrl' => true,
+            'cache' => null,
+            'rules' => [
+                [
+                    'pattern' => '',
+                    'route' => 'frontend/page/view',
+                    'defaults' => ['slug' => 'index'],
+                ],
+                'page/<slug>' => 'frontend/page/view',
+            ],
+            'baseUrl' => '/test',
+            'scriptUrl' => '/test',
+        ]);
+        $url = $manager->createUrl(['frontend/page/view', 'slug' => 'services']);
+        $this->assertEquals('/test/page/services', $url);
+        $url = $manager->createUrl(['frontend/page/view', 'slug' => 'index']);
+        $this->assertEquals('/test/', $url);
     }
 
     /**