When in the lower sewers, I was killing some slimes and there’s a section of the level that you are walking upward and then it peaks and goes down. I was trying to attack some slimes and when trying to attack up/forward my character would only attack downwards even though my cursor is at the top of the screen.
I believe this might have something to do with elevation of the level.
I took a screenshot of the location where I was having this issue.