[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
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 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:
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Comment (by westonruter):

 Re-posting my [https://core.trac.wordpress.org/ticket/64389#comment:26
 comment] from #64389:

 > I've just finished another pass at improving the preservation of classic
 theme CSS cascade when loading block styles on demand.
 >
 > The PR description has been fleshed out with all the details, but in
 short:
 >
 > 1. Determining where to insert the styles hoisted from the footer has
 been made more robust by inserting placeholder inline styles. This
 simplifies the insertion logic since it doesn't have to hunt around for
 references for where styles should be inserted. It merely needs to replace
 the placeholders with the captured styles.
 > 2. The CSS cascade is now improved for inline styles which had been
 added to `wp-block-library`. Now when loading separate block styles, any
 such inline styles get added //after// any of the separate core block
 styles.
 >
 > Note: Do not have Gutenberg active when testing this, as the patch has
 not yet been applied to Gutenberg's forked version of
 `wp_enqueue_global_styles()`.
 >
 > Review and testing much appreciated: https://github.com/WordPress
 /wordpress-develop/pull/10875
 >
 > I really hope to get this into the next beta.

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Ticket URL: <https://core.trac.wordpress.org/ticket/64710#comment:3>
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