Possible padding in bits of the encrypted/decrypted data

[Juansecu]

It looks like Rijndael is adding some padding to the bits of the encrypted data.

I'm working with the next code:

But when I test this implementation of the library, I get these results:

In this case, decryption of the data works, but there is an issue with the length of this decrypted data.

Do you know what could be the reason of this behavior?