diff --git a/packages/NodeTypeResolver/src/NodeTypeResolver.php b/packages/NodeTypeResolver/src/NodeTypeResolver.php
index cb37f72cbb0..a6020dd65aa 100644
--- a/packages/NodeTypeResolver/src/NodeTypeResolver.php
+++ b/packages/NodeTypeResolver/src/NodeTypeResolver.php
@@ -406,7 +406,14 @@ final class NodeTypeResolver
             return [];
         }
 
-        // PHPStan
+        // skip anonymous classes, ref https://github.com/rectorphp/rector/issues/1574
+        if ($node instanceof Expr\New_) {
+            $className = $this->nameResolver->resolve($node->class);
+            if ($className === null || Strings::contains($className, 'AnonymousClass')) {
+                return [];
+            }
+        }
+
         $type = $nodeScope->getType($node);
 
         $typesInStrings = $this->typeToStringResolver->resolve($type);
diff --git a/packages/Symfony/tests/Rector/New_/StringToArrayArgumentProcessRector/Fixture/skip_anonymous_class.php.inc b/packages/Symfony/tests/Rector/New_/StringToArrayArgumentProcessRector/Fixture/skip_anonymous_class.php.inc
new file mode 100644
index 00000000000..197e22240a6
--- /dev/null
+++ b/packages/Symfony/tests/Rector/New_/StringToArrayArgumentProcessRector/Fixture/skip_anonymous_class.php.inc
@@ -0,0 +1,14 @@
+<?php
+
+namespace Rector\Symfony\Tests\Rector\New_\StringToArrayArgumentProcessRector\Fixture;
+
+class SkipAnonymousClass
+{
+    public function buildForm($builder): void
+    {
+        $builder->add(
+            new class() {
+            }
+        );
+    }
+}
diff --git a/packages/Symfony/tests/Rector/New_/StringToArrayArgumentProcessRector/StringToArrayArgumentProcessRectorTest.php b/packages/Symfony/tests/Rector/New_/StringToArrayArgumentProcessRector/StringToArrayArgumentProcessRectorTest.php
index b980367afaa..1e881352f8c 100644
--- a/packages/Symfony/tests/Rector/New_/StringToArrayArgumentProcessRector/StringToArrayArgumentProcessRectorTest.php
+++ b/packages/Symfony/tests/Rector/New_/StringToArrayArgumentProcessRector/StringToArrayArgumentProcessRectorTest.php
@@ -17,6 +17,7 @@ final class StringToArrayArgumentProcessRectorTest extends AbstractRectorTestCas
             __DIR__ . '/Fixture/fixture3.php.inc',
             __DIR__ . '/Fixture/fixture4.php.inc',
             __DIR__ . '/Fixture/with_sprintf.php.inc',
+            __DIR__ . '/Fixture/skip_anonymous_class.php.inc',
         ]);
     }