Capitalized words are not inflected

Found a strange issue when trying to retrieve the plural of property, using either plural() or plural_noun():

Python 3.11.5 (tags/v3.11.5:cce6ba9, Aug 24 2023, 14:38:34) [MSC v.1936 64 bit (AMD64)] on win32

>>> import inflect
>>> p = inflect.engine()

>>> p.plural('property')
'properties'

>>> p.plural('Property')
'Propertys'

I looked through the documentation, but didn't see any notes about why this would be.

I think the plural of property, whether capitalized or not, should be properties.