[Python] Enigma code stops working after 101 characters

I wrote an enigma code that works fine for the first 100 characters, but after that it just stops encoding correctly. Below is my full code (this time with the plugboard function added). I also commented some lines of code that could be used for debugging, i.e. those lines will show how the letters are changed through different rotors.

def rotate(string):
return string[1:] + string[0]
def rotor_rotations(rotors, alfators, notches):
rotors[2] = rotate(rotors[2])
alfators[2] = rotate(alfators[2]) #rotates first rotor every time
if notches[2] == rotors[2][-1]:
#print('rotor 2 rotated')
rotors[1] = rotate(rotors[1]) #rotates second rotor if first rotor is at notch position
alfators[1] = rotate(alfators[1])
if notches[1] == rotors[1][-1]: #rotates if second rotor is at notch position
rotors[0] = rotate(rotors[0])
alfators[0] = rotate(alfators[0])
return rotors, alfators
def rotor(text, rotors, alfators, ukw, notches):
alfabet = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
retext = ''
for letter in text:
printtext = letter
rotors, alfators = rotor_rotations(rotors, alfators, notches) #rotate rotors first
index = alfabet.index(letter)
for i in range(2, -1, -1): #go through rotors 1, 2 and 3
letter = rotors[index]
# printtext += '⚙' + letter
index = alfators.index(letter)
letter = ukw[0][index] #go through the reflector
#printtext += '⇄' + letter
index = rotors[0].index(letter)
for i in range(1, 3): #go through rotors 3, 2, 1
letter = alfators[index]
# printtext += '⚙' + letter
index = rotors.index(letter)
letter = alfabet[index]
#printtext += '⚙' + letter
retext += letter
#print(printtext)
return retext, rotors, alfators
def enigma(text):
rotors =['EKMFLGDQVZNTOWYHXUSPAIBRCJ', 'AJDKSIRUXBLHWTMCQGZNPYFVOE', 'BDFHJLCPRTXVZNYEIWGAKMUSQO']
alfators = ['ABCDEFGHIJKLMNOPQRSTUVWXYZ']*3
ukw = ['YRUHQSLDPXNGOKMIEBFZCWVJAT']
notches = ['X', 'S', 'M']
plugboard_settings = {}
text = text.split(' ')
encrypted_text = ''
for piece in text:
first = plugboard(piece, plugboard_settings)
second, rotors, alfators = rotor(first, rotors, alfators, ukw, notches)
encrypted_text += plugboard(second, plugboard_settings) + ' '
return encrypted_text

def plugboard(piece, settings):
# No plugboard functionality implemented yet
return piece

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