UnicodeDecodeError on Mac OS X with Python 3.10

Python: 3.10.5
lxml: 4.9.1
OS: Mac OS X

When parsed text contains an emoji character a UnicodeDecodeError is raised. This only happens with Python 3.10 on OS X, not on Linux nor Windows.

Full traceback:

Python 3.10.4 (main, May 18 2022, 22:24:47) [Clang 13.0.0 (clang-1300.0.29.3)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import readtime
>>> result = readtime.of_markdown"👽"
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/users/note/workspace/readt ime/readtime/api.py", line 40, in of_markdown
    return utils.read_time(markdown, format='markdown', wpm-wpm)
  File "/Users/note/workspace/readtime/readtime/utils.py", line 49, in read_time
    text, images = parse_html(el)
  File "/Users/note/workspace/readtime/readtime/utils.py", line 115, in parse_html
    add_text(tag, no_tail=True)
  File "/Users/note/workspace/readtime/readtime/utils.py", line 105, in add_text
    if tag. text and not isinstance(tag, lxml.etree._Comment):
  File "src/lxml/etree.pyx", line 1035, in lxml.etree._Element.text. __get_
  File "src/lxml/apihelpers.pxi", line 707, in lxml.etree.collectText
  File "src/lxml/apihelpers.pxi", line 1507, in lxml.etree.funicode
UnicodeDecodeError: 'utf-8' codec can't decode_byte Oxf4 in position 9: unexpected end of data