Are you using SlickEdit version 24 ? (2019)
I've reported Git problems a while ago
hereAnd the issue was fixed in version 25.0.0.9.
AFAIK, they didn't fix this in the older versions of SlickEdit (and I think it goes back to SlickEdit 2017, or 2016 at least that's the oldest version I could find)
Also, I think Dan posted a "work-around" that you could use.
Hope this helps