CCSS issue

please go to Page Optm -> CSS tune -> UCSS exclude URI, add / , save and purge all , see how it goes.

it works, but page speed drops down

then it’s more like UCSS related, instead of CCSS, please check this page

Can it be because of Guest Optimization?

Guest Optm will apply UCSS as well , but the root cause is incomplete UCSS

I fixed almost everything with UCSS Selector Allowlist, except dropdown menu.

Problem

https://gyazo.com/e20c26b21e24e8fb95addf386e52fbc9

Should be

https://gyazo.com/597bc629edbebb0e481babd9a9306a14

Maybe you know how to fix it?