It appears that the latest dashicons update in WP 5.2 release has changed some styling to include unitless line-heights as part of a coding standards sweep. This causes some icons to be misaligned in the customizer now.
To Reproduce
Steps to reproduce the behavior:
- Activate the latest Crio theme
- Go to the WP Customizer
The result is that the icons are not aligned with the text.
Expected behavior
The icons should be aligned properly with the text.
Screenshots
Icons misaligned:

Verified this issue occurs on all browsers/OS and mobile.
Note: it appears that this only occurs when debug is turned off.