Im an vedic astrologer/programmer , I know my own ascendant zodiac sign and degree for 20 years.
It doesnt change much from astrology software to astrology software.
But yesterday I stumbled into calculating using swiss ephemeris my own ascendant.
And instead of around 22 degrees in aquarius ( 11th sign ) it is in the next sign around 20 degrees ahead in pisces around 12 degrees in pisces.
It happens with both local executable i have here that i compiled a year ago around april 2023.
And also in https://www.astro.com/swisseph/swetest.htm which is the official teste page for swiss ephemeris current version.
I tried everything , checked north and south east and west latitude and longitude.
Even tried different house systems like placidus , equal and so on and so forth.
All variations are still in pieces. I use Lahiri ayanamsa.
I tried even made up dates like jan 1st 1970 00:00 in sao paulo brazil, and compared with websites like astro-seek https://horoscopes.astro-seek.com/ascendant-rising-sign-calculator
It is indeed , even with other dates, giving around 20 or 25 degrees ahead.