Wider characters either aren't clipped into single character boxes, or don't expand to two character boxes in the flow of the terminal

[kode54]

The ellipses in these screen shots overflow into two character boxes. In Alacritty, they behave in the terminal as if they are double width characters, so the terminal doesn't overflow the rest of the line. In Cosmic Term, the line is bumped further to the left by one character.

Alacritty:

Cosmic Term:

I am using my own flavor of Iosevka as the terminal font. I can upload a copy of the Regular variant if necessary.