[wp-trac] [WordPress Trac] #64710: WordPress 6.9.1 is screwing up our front end styles, had to revert

[WordPress Trac]

#64710: WordPress 6.9.1 is screwing up our front end styles, had to revert
--------------------------------+------------------------------
 Reporter:  webmaster in texas  |       Owner:  (none)
     Type:  defect (bug)        |      Status:  new
 Priority:  normal              |   Milestone:  Awaiting Review
Component:  Upgrade/Install     |     Version:  6.9.1
 Severity:  normal              |  Resolution:
 Keywords:  reporter-feedback   |     Focuses:
--------------------------------+------------------------------
Changes (by westonruter):

 * keywords:   => reporter-feedback


Comment:

 @webmaster-in-texas Hello. If you're using a classic theme (i.e. you don't
 have the Site Editor available), this may be a duplicate of #64389, or at
 least related. Please confirm.

 Also, if that is the case, there is a hotfix plugin to undo the
 performance enhancement in 6.9 that caused the issue. Please try
 [https://wordpress.org/plugins/load-combined-core-block-assets/ Load
 Combined Core Block Assets] (as referenced in
 [https://make.wordpress.org/core/2025/12/12/wordpress-6-9-hotfixes/
 WordPress 6.9 Hotfixes]). It provides a way to opt in to loading separate
 block styles via a query parameter to see if a core update fixes the
 issue. Sharing your site URL with that plugin active would be helpful for
 us to debug as well.

 If you can test the [https://github.com/WordPress/wordpress-
 develop/pull/10875 pull request] for the aforementioned ticket to see if
 it fixes the issue for you, that would also be very helpful.

-- 
Ticket URL: <https://core.trac.wordpress.org/ticket/64710#comment:2>
WordPress Trac <https://core.trac.wordpress.org/>
WordPress publishing platform