Bug report: Incorrect railfence decryption

[Hritik14]

Describe the bug
RailFence decryption is incorrectly adding some trailing spaces (padding?) before decryption which is resulting in incorrect plaintext.

To Reproduce
Steps to reproduce the behaviour or a link to the recipe / input used to cause the bug:

1. Go to cyberchef
2. Input cipher text : /1E11v1 ee1smr1hoyaosF2u r/lpisdled enh
3. Select RailFence cipher with key: 11 and
4. Observe plain text: /1era2/sdh dluo1e11v1hs ple neirFos1E my

Expected behaviour
Plaintext should be: /EveryFriends/2a111111 should help some
It can be verified on this site.

Additional context
It can be observed on the same site that railfence of
ciphertext: /1E11v1 ee1smr1hoyaosF2u r/lpisdled enh (with 5 trailing spaces)
results in plaintext: /1era2/sdh dluo1e11v1hs ple neirFos1E my
which matches the cyberchef response.

It appears as if CyberChef is padding the input ciphertext with key - len%key i.e. 11 - 39%11 = 5 spaces characters to meet the nearest block size of 11.