Setting read_cache_expiry_seconds

Question

I'm trying to set the read_cache_expiry_seconds option to some user uploads, but the files seems to be cached by 3600 seconds (default) instead the value I want.

The resource context I'm adding is the following:

        $_defaultMetadata = [
                            'gs' => [   
                                        'enable_cache' => true,
                                        'enable_optimistic_cache' => false,
                                        'read_cache_expiry_seconds' => 60,
                                        'Cache-Control' => 'public, max-age=60'
                                    ]
                            ];
        $ctx = stream_context_create($_defaultMetadata);
        file_put_contents( 'gs://' . $bucketPath,  $data, 0 , $ctx);

Any idea why this context is not working ?