[wp-trac] [WordPress Trac] #59847: Since WordPress 6.4, the functions.php of a theme moved to a different location using register_theme_directory is no longer called

[WordPress Trac]

#59847: Since WordPress 6.4, the functions.php of a theme moved to a different
location using register_theme_directory is no longer called
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 Reporter:  partyfrikadelle  |       Owner:  joemcgill
     Type:  defect (bug)     |      Status:  reviewing
 Priority:  normal           |   Milestone:  Awaiting Review
Component:  Bootstrap/Load   |     Version:  6.4
 Severity:  critical         |  Resolution:
 Keywords:                   |     Focuses:  template, performance
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Comment (by coreyw):

 @partyfrikadelle good work. You're right, WP core does not call
 `get_stylesheet_directory()` that early by default. In my case, we are
 including Advanced Custom Fields as a "must-use" plugin, and it calls that
 function first, before our custom theme directory is registered. A
 "simple" solution is to make our plugin load first (must-use are loaded in
 alphabetical order far as I know). Since there is a workaround I'm not
 sure if there needs to be any fix applied, but it should be documented
 that calls to `register_theme_directory()` should be prioritized.

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Ticket URL: <https://core.trac.wordpress.org/ticket/59847#comment:8>
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