I am hoping someone has encountered similiar issue. We are picking up that after publishing changes, that some users are not seeing the latest CSS changes on Desktop Chrome. We first thought it is one user and specific to corporate PCs but the issue is showing more in general public viewers.
I recently encountered it myself on specific url page (PROD) clear my browser cache (all history) and then tested the change again but on our specific url page but in PREPROD and the issue remained.
The line of code 2513 under clientlib-site.css was not showing up on my page.
Mobile Chrome, Safari Desktop and Safari Browser, Firefox no issues.
It looks like cache issue. May be the one of the publish server is still having old version of CSS cached which is not having below mentioned class. Do consider using appending hash value to the client library to have load latest css/js and avoid caching issue.
You can use ACS AEM commons - Versioned ClientLibs