Cache invalidation with TAG

Hi,

I am using Nette\Cache currently with redis, but I have the same problem with file cache too.

When I do this:

return $this->cache->load($date, function (& $dependencies) use ($date) {
			$dependencies = array(
				Caching\Cache::TAGS => array("a"),
			);

			...
			return ...;

and then this:

		$this->cache->clean(array(
			Caching\Cache::TAGS => array("a")
		));

the cache is not invalidated.

But when I do this:

return $this->cache->load($date, function (& $dependencies) use ($date) {
			$dependencies = array(
				Caching\Cache::EXPIRATION => time(),
// or this		Caching\Cache::EXPIRE => '1 seconds',
			);

or even this:

		$this->cache->clean(array(
			Caching\Cache::ALL => true,
		));

It works perfectly.

Versions:

"require": {
		"php": "~5.4.0",
		"nette/application": "~2.3.0",
		"nette/bootstrap": "~2.3.0",
		"nette/caching": "~2.3.0",
...

Thanks in advance.