When walking, character will drift. Drift is not based on the direction the player is facing. It's based on cardinal direction.
Issue persists in both classic and modern mode, with or without framerate capped, and with walking pace on classic or modern.
If the player walks against the direction they drift in, they are slowed by it.
Possibly related: Sometimes the player will slide a few inches in a particular direction when they stop moving, as seen at the end of the attached video.
Good evening and thank you for reporting this issue (great username too)
I'm looking into this. The video is very helpful. It looks like this behaviour was in the original game too, but it's not desirable. I'll report back with a fix soon.