after update 2.12.2021.

Hi @elloboafarkas ,

Could you please let us know what issue you experienced after the update on 2nd December? The link you’ve shared goes to a ‘404’ page so it looks like the page no longer exists. We’ll be happy to look into any issues or share any information that could be of help if we have more information about what issues you experienced on your site. Thank you!

Thanks! I solved it.
In the WP Fastes Cache plugin, CSS options (CSS combining) hit the Boost CSS settings.
Thank you!

Additional blog post:
SEO: Jetpack Boost and Collisions