Resized icons don't display properly

Hello world. I’m working on a game with mechanics called “blood” and “prestige” as resources for player characters. I’m building an admin screen to modify these traits. I’ve created four buttons to manipulate these values. To do so, I took example icons and changed their size. This is what they look like in React Studio:

Closeup

And here’s what they look like when I compile them in the browser:
image

and

image
I think the second set of icons is less skewed because I haven’t resized them as much yet.

Please advise. Thanks.