[wp-trac] [WordPress Trac] #37714: WP 4.6 featured image issue

[WordPress Trac]

#37714: WP 4.6 featured image issue
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 Reporter:  northeme      |      Owner:
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  General       |    Version:  4.6
 Severity:  normal        |   Keywords:
  Focuses:                |
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 There is a problem since WP 4.6 with featured image thumbnails. A new
 hidden field called _thumbnail_id is being added automatically into the
 Set Featured Image panel. However, removing or adding a new thumbnail also
 adds a secondary _thumbnail_id field right before this default
 _thumbnail_id field.

 Therefore, thumbnail changes are being ignored since PHP forms only take
 the last field into account. I've been using a custom Set Featured Image
 panel for my themes yet removing the custom code shows that the default
 one has also this problem. Could you confirm that is this an issue on my
 end or about WP 4.6?

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Ticket URL: <https://core.trac.wordpress.org/ticket/37714>
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