Module urljoin does not appear to work with scheme Gemini

Good day.

Yesterday, I have added support for a new syndication format, Gemini
feed.

Yet, it appears that module urljoin fails at its task, even though
module urlsplit correctly handles Gemini.

Python 3.13.3

from urllib.parse import urljoin
urljoin('gopher://gopher.floodgap.com:70/1/overbite', '../one-level-up')

'gopher://gopher.floodgap.com:70/one-level-up'

urljoin('gopher://gopher.floodgap.com:70/1/overbite', 'same-level')

'gopher://gopher.floodgap.com:70/1/same-level'

urljoin('gemini://woodpeckersnest.space/~schapps/journal/2025-04-20-slixfeed-gemini-and-twtxt.gmi', '../one-level-up')

'../one-level-up'

urljoin('gemini://woodpeckersnest.space/~schapps/journal/2025-04-20-slixfeed-gemini-and-twtxt.gmi', 'same-level')

'same-level'

from urllib.parse import urlsplit
urlsplit('gopher://gopher.floodgap.com:70/1/overbite')

SplitResult(scheme='gopher', netloc='gopher.floodgap.com:70', path='/1/overbite', query='', fragment='')                                        

urlsplit('gemini://woodpeckersnest.space/~schapps/journal/2025-04-20-slixfeed-gemini-and-twtxt.gmi')

SplitResult(scheme='gemini', netloc='woodpeckersnest.space', path='/~schapps/journal/2025-04-20-slixfeed-gemini-and-twtxt.gmi', query='', fragment='')

                                                                                                                                            

https://git.xmpp-it.net/sch/Slixfeed/src/branch/master/slixfeed/parser/gmi.py

Is this a problem with the module urljoin?

To whom should reports about such concern be conveyed?

Please advise.

Kind regards,
Schimon