lock method creates empty folder

[benjaminfunk]

If i use the lock method, the cache system creates an empty folder. Is that normal? This is my setup:

$objCacheDriver = new \Stash\Driver\FileSystem(
[
	'path' => $this->objConfig->get('cache.file.path')
]);

$objCache = new \Stash\Pool($objCacheDriver);

$objCacheItem = $objCache->getItem('product.1233.444.555');

$mixCacheData = $objCacheItem->get();

if ($objCacheItem->isMiss())
{
	$objCacheItem->lock();

	$mixCacheData = 1337;

	$objCacheItem->set($mixCacheData);

	$objCache->save($objCacheItem);
}