This behavior is usually caused by a cache plugin. Configure your plugin, for example you can disable cache for logged-in administrator, or add plugin folder into exception. Or just do not forget to clear the cache after each saving of the preset settings

WP Rocket

How to Disable cache for logged-in administrators 

Litespeed cache

Go to Cache > Exclude Select "Administrator" role for exlcude

DIVI Builder

Follow to DIVI > Theme Options > Builder > Advancedand enable the toggle Static CSS File Generation

WP Super Cache

Check the box beside "Disable caching for logged in visitors" option in Avanced settings

 WP Fastest Cache Settings

In plugin setting check the box beside "Don't show the cached version for logged-in users"