[wp-trac] [WordPress Trac] #53644: WPeditor not fully initialized in a classic metabox

[WordPress Trac]

#53644: WPeditor not fully initialized in a classic metabox
--------------------------+-----------------------------
 Reporter:  dway          |      Owner:  (none)
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  TinyMCE       |    Version:  5.6
 Severity:  normal        |   Keywords:  needs-testing
  Focuses:  javascript    |
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 Since WordPress 5.6, a call to wpeditor() in a classic metabox loads
 partially TinyMCE : the buttons seems to work, Text tab too, but visual
 edition stay white, without cursor or content (that you can add in the
 Text tab).

 It's really close to #53632 but the only way to get the visual tab working
 is :
 - edit a post
 - click Text tab of tinyMCE
 - reload page (CTRL-R)
 - and then click on Visual tab
 If the visual tab is the one showing first, it stays white.

 I've also tried with the Changeset [51407], but the bug remains the same.

 You can test it by adding the attached code to your theme or plugin, on a
 fresh install of WP.

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Ticket URL: <https://core.trac.wordpress.org/ticket/53644>
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