The divider behavior in my code sandbox is weird. Sometimes is shows up thicker and sometimes they don't even show up. This can be reproduced by cmd+/- on mac to adjust the zoom on your browser. Please see screenshots attached for examples.

Expected Behavior 🤔

Current Behavior 😯

Steps to Reproduce 🕹

https://codesandbox.io/s/mmnoyvq9oy

Context 🔦

Just trying to make my dialogs work in a few different contexts

Your Environment 🌎