diff --git a/framework/CHANGELOG.md b/framework/CHANGELOG.md
index e3a9eb3064..bb64e7b2f3 100644
--- a/framework/CHANGELOG.md
+++ b/framework/CHANGELOG.md
@@ -35,6 +35,7 @@ Yii Framework 2 Change Log
 - Enh #19416: Update and improve configurations for `yii\console\controllers\MessageController` (WinterSilence)
 - Bug #19403: Fix types in `yii\web\SessionIterator` (WinterSilence)
 - Enh #19420: Update list of JS callbacks in `yii\widgets\MaskedInput` (WinterSilence)
+- Bug #19445: Fix caching in `yii\i18n\Formatter::getUnitMessage()` (WinterSilence)
 
 
 2.0.45 February 11, 2022
diff --git a/framework/i18n/Formatter.php b/framework/i18n/Formatter.php
index e1bdbc43c6..82af552007 100644
--- a/framework/i18n/Formatter.php
+++ b/framework/i18n/Formatter.php
@@ -1643,8 +1643,8 @@ class Formatter extends Component
      */
     private function getUnitMessage($unitType, $unitFormat, $system, $position)
     {
-        if (isset($this->_unitMessages[$unitType][$system][$position])) {
-            return $this->_unitMessages[$unitType][$system][$position];
+        if (isset($this->_unitMessages[$unitType][$unitFormat][$system][$position])) {
+            return $this->_unitMessages[$unitType][$unitFormat][$system][$position];
         }
         if (!$this->_intlLoaded) {
             throw new InvalidConfigException('Format of ' . $unitType . ' is only supported when PHP intl extension is installed.');
@@ -1676,7 +1676,7 @@ class Formatter extends Component
             $message[] = "$key{{$value}}";
         }
 
-        return $this->_unitMessages[$unitType][$system][$position] = '{n, plural, ' . implode(' ', $message) . '}';
+        return $this->_unitMessages[$unitType][$unitFormat][$system][$position] = '{n, plural, ' . implode(' ', $message) . '}';
     }
 
     /**
diff --git a/tests/framework/i18n/FormatterTest.php b/tests/framework/i18n/FormatterTest.php
index 300f2b7148..9e8d4df6ca 100644
--- a/tests/framework/i18n/FormatterTest.php
+++ b/tests/framework/i18n/FormatterTest.php
@@ -34,14 +34,15 @@ class FormatterTest extends TestCase
             'timeZone' => 'UTC',
             'language' => 'ru-RU',
         ]);
-        $this->formatter = new Formatter(['locale' => 'en-US']);
+        if (!isset($this->formatter)) {
+            $this->formatter = new Formatter(['locale' => 'en-US']);
+        }
     }
 
     protected function tearDown()
     {
         parent::tearDown();
         IntlTestHelper::resetIntlStatus();
-        $this->formatter = null;
     }
 
     public function testFormat()