eCryptfs With Mount Command Has Passphrase Cache?

Guys help me understand this! I'm using **eCryptfs** with mount command to encrypt a single folder. In first time for setup the volume I run:

mount --types ecryptfs /path/to/.private /path/to/.private

So I choose the options. For second time or any other after setup I run:

mount --types ecryptfs --options key=passphrase,ecryptfs_key_bytes=,ecryptfs_cipher=,ecryptfs_passthrough=no /path/to/.private /path/to/.private

So, when I do this steps directly in **command line** and I type a wrong password the volume are mounted but your content stay encrypted, works as expected but, when I put this steps inside a script even though I type a wrong password the content of volume are decrypted! The **eCryptfs** has some cache for the passphrase? It some that I'm not knowledg? PS: sorry for my english, I'm learning yet :)