I have monospace enabled in the code editor and as you can see the text between the first and second line is off by one pixel. I have switched between regular and monospace and the issue remains the same.

I've noticed this too, it really annoys me especially when indenting multiple times.

Yeah, the tabs aren't affected. I think that's because it's not actually part of the font, it's part of the code editor. It would be nice if it was a multiple of the monospace width.