diff --git a/src/Type/FileTypeMapper.php b/src/Type/FileTypeMapper.php
index 2c281f58ca..006ce440a6 100644
--- a/src/Type/FileTypeMapper.php
+++ b/src/Type/FileTypeMapper.php
@@ -542,6 +542,7 @@ function (Node $node) use ($fileName, $lookForTrait, &$traitFound, $traitMethodA
 							&& !($node instanceof Node\Stmt\Expression && $node->expr instanceof Node\Expr\Include_)
 						)
 					) && !array_key_exists($nameScopeKey, $nameScopeMap)
+					&& ($lookForTrait === null || $traitFound)
 				) {
 					$parentNameScope = array_last($typeMapStack) ?? null;
 					$typeAliasesMap = array_last($typeAliasStack) ?? [];
diff --git a/tests/PHPStan/Analyser/nsrt/bug-12639.php b/tests/PHPStan/Analyser/nsrt/bug-12639.php
new file mode 100644
index 0000000000..ada55f669a
--- /dev/null
+++ b/tests/PHPStan/Analyser/nsrt/bug-12639.php
@@ -0,0 +1,55 @@
+<?php declare(strict_types = 1);
+
+namespace Bug12639\Types;
+
+/** @template T */
+class ObjectRefT
+{
+	/** @var T */
+	public $value;
+}
+
+namespace Bug12639\Accounts;
+
+class Account
+{
+}
+
+namespace Bug12639\Policy;
+
+use Bug12639\Types\ObjectRefT;
+use Bug12639\Accounts\Account;
+use function PHPStan\Testing\assertType;
+
+trait BaseAccount
+{
+	/**
+	 * @var ObjectRefT<Account>
+	 */
+	protected ObjectRefT $account;
+}
+
+class StandardAccount
+{
+	use BaseAccount;
+
+	public function doTest(): void
+	{
+		assertType('Bug12639\Types\ObjectRefT<Bug12639\Accounts\Account>', $this->account);
+	}
+}
+
+namespace Bug12639\OtherPlace;
+
+use Bug12639\Policy\BaseAccount;
+use function PHPStan\Testing\assertType;
+
+class AnotherUser
+{
+	use BaseAccount;
+
+	public function doTest(): void
+	{
+		assertType('Bug12639\Types\ObjectRefT<Bug12639\Accounts\Account>', $this->account);
+	}
+}
diff --git a/tests/PHPStan/Type/FileTypeMapperTest.php b/tests/PHPStan/Type/FileTypeMapperTest.php
index d613047140..fc77cd3aa3 100644
--- a/tests/PHPStan/Type/FileTypeMapperTest.php
+++ b/tests/PHPStan/Type/FileTypeMapperTest.php
@@ -196,6 +196,40 @@ public function testFileWithCyclicPhpDocs(): void
 		$this->assertSame('CyclicPhpDocs\Foo|iterable<CyclicPhpDocs\Foo>', $returnTag->getType()->describe(VerbosityLevel::precise()));
 	}
 
+	public function testBug12639TraitPropertyPhpDocResolution(): void
+	{
+		self::createReflectionProvider();
+
+		/** @var FileTypeMapper $fileTypeMapper */
+		$fileTypeMapper = self::getContainer()->getByType(FileTypeMapper::class);
+
+		$classRealpath = realpath(__DIR__ . '/data/bug-12639-class.php');
+		if ($classRealpath === false) {
+			throw new ShouldNotHappenException();
+		}
+
+		// Simulate how PhpClassReflectionExtension calls getResolvedPhpDoc for a trait property
+		// When the trait is in a different file, $fileName is the class file
+		$resolved = $fileTypeMapper->getResolvedPhpDoc(
+			$classRealpath,
+			'Bug12639Separate\OtherPlace\StandardAccount',
+			'Bug12639Separate\Policy\BaseAccount',
+			null,
+			'/**
+ * @var ObjectRefT<Account>
+ */',
+		);
+
+		$varTags = $resolved->getVarTags();
+		$this->assertArrayHasKey(0, $varTags);
+		// Account should resolve to Bug12639Separate\Accounts\Account (from the trait's use statement),
+		// not Bug12639Separate\OtherPlace\Account (class namespace)
+		$this->assertSame(
+			'Bug12639Separate\Types\ObjectRefT<Bug12639Separate\Accounts\Account>',
+			$varTags[0]->getType()->describe(VerbosityLevel::precise()),
+		);
+	}
+
 	public function testFilesWithIdenticalPhpDocsUsingDifferentAliases(): void
 	{
 		/** @var FileTypeMapper $fileTypeMapper */
diff --git a/tests/PHPStan/Type/data/bug-12639-class.php b/tests/PHPStan/Type/data/bug-12639-class.php
new file mode 100644
index 0000000000..4031e90a4f
--- /dev/null
+++ b/tests/PHPStan/Type/data/bug-12639-class.php
@@ -0,0 +1,10 @@
+<?php declare(strict_types = 1);
+
+namespace Bug12639Separate\OtherPlace;
+
+use Bug12639Separate\Policy\BaseAccount;
+
+class StandardAccount
+{
+	use BaseAccount;
+}
diff --git a/tests/PHPStan/Type/data/bug-12639-trait.php b/tests/PHPStan/Type/data/bug-12639-trait.php
new file mode 100644
index 0000000000..d9a96d5928
--- /dev/null
+++ b/tests/PHPStan/Type/data/bug-12639-trait.php
@@ -0,0 +1,18 @@
+<?php declare(strict_types = 1);
+
+namespace Bug12639Separate\Policy;
+
+if (true) {
+	// some statement before use declarations
+}
+
+use Bug12639Separate\Types\ObjectRefT;
+use Bug12639Separate\Accounts\Account;
+
+trait BaseAccount
+{
+	/**
+	 * @var ObjectRefT<Account>
+	 */
+	protected ObjectRefT $account;
+}