Python DateFinder package weird quirk with word after date

Question

I am confused by the python datefinder package not finding a date with a simple format. Here is the simple code that I have:

import datefinder

s = "29 November 2007 Last"

matches = datefinder.find_dates(s,index=True)
for m_date in matches:
    print(m_date)

This code doesn't return anything but if I remove or change the character L from the word "Last", the script returns the date correctly. I also tried with a lowercase "l" but it doesn't work either. For example, this works:

import datefinder

s = "29 November 2007 Past"

matches = datefinder.find_dates(s,index=True)
for m_date in matches:
    print(m_date)

Can anyone tell me if I'm doing something wrong? Is datefinder confusing the character "L" for another one thus messing up the date pattern? Thanks for your help!