We have used JCH Optimize through the years to improve the load times of websites. While making an update to a Joomla 3.10.2 website and updated the JCH to version 7.0.1. This ended up altering our CSS and removed the padding from the Navigation section. We didn’t delve into finding the exact issue yet, but simply turning the plugin off fixed our issue till we get it fully resolved.
Let us know if this helped you..