[wp-trac] [WordPress Trac] #36389: Selective refresh for widgets gets lost once `refresh` is used

[WordPress Trac]

#36389: Selective refresh for widgets gets lost once `refresh` is used
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 Reporter:  scamartist26       |       Owner:
     Type:  defect (bug)       |      Status:  closed
 Priority:  normal             |   Milestone:  Awaiting Review
Component:  Customize          |     Version:  trunk
 Severity:  normal             |  Resolution:  invalid
 Keywords:  reporter-feedback  |     Focuses:
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Comment (by scamartist26):

 I think it has something to do with sidebar registration. I am not sure,
 but I recreated the behavior with the Twenty Sixteen theme and no active
 plugins like this:

    1. Comment out line 123 from `functions.php` in Twenty Sixteen
    2. Create `mu-plugins` directory with a `{plugin}.php` file
    3. Add this to file:
 {{{#!php
 <?php
 add_action( 'after_setup_theme', function() {
         add_theme_support( 'customize-selective-refresh-widgets' );
 });
 }}}
    4. Go to Customizer/Widgets/Sidebar and add a text widget with some
 text. ( Note it refreshes partial )
    5. Next go to Customizer/Site Identity and change "Display Site Title
 and Tagline" to make preview refresh
    6. At this point, anything that would do a Partial refresh is lost.
    7. If you add the 11 priority to the `after_theme_setup` action,
 refresh the Customizer and run the test again you will see it now behaves
 correctly.

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Ticket URL: <https://core.trac.wordpress.org/ticket/36389#comment:5>
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