[wp-trac] [WordPress Trac] #54916: Admin panel's "Customizer" sub menu is replaced with "Widgets" for block based themes

[WordPress Trac]

#54916: Admin panel's "Customizer" sub menu is replaced with "Widgets" for block
based themes
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 Reporter:  Rufus87         |       Owner:  (none)
     Type:  defect (bug)    |      Status:  new
 Priority:  normal          |   Milestone:  5.9.1
Component:  Administration  |     Version:  5.9
 Severity:  major           |  Resolution:
 Keywords:  has-patch       |     Focuses:
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Comment (by ironprogrammer):

 Thanks, @rufus87!

 ==== Testing
 I am able to replicate this issue given the following conditions:

 - WordPress version is 5.9.
 - Active theme is a registered block theme.
 - Theme registers widget support: `add_theme_support( 'widgets' )`.
 - Theme hooks the `customize_register` action.

 ==== Patch
 Please check the patch against [https://developer.wordpress.org/coding-
 standards/wordpress-coding-standards/php/ WordPress's PHP coding
 standards] or a utility like `phpcs`, which should help resolve the errors
 on the PR's merge check.

 ==== Notes
 Menu item position `8` is not "reserved" for any other menu item, so this
 shift does not interfere with other built-in menu items. As such, the
 check for `wp_is_block_theme` may not be strictly necessary in this case.

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Ticket URL: <https://core.trac.wordpress.org/ticket/54916#comment:4>
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