[wp-trac] [WordPress Trac] #44705: Edit embed contents without saving post breaks previews

[WordPress Trac]

#44705: Edit embed contents without saving post breaks previews
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 Reporter:  7studio       |      Owner:  (none)
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  Embeds        |    Version:  4.9.7
 Severity:  normal        |   Keywords:
  Focuses:                |
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 It seems that when we insert embed content and edit it just after without
 saving the post, the embed preview isn't displayed.

 **To Reproduce**

 Steps to reproduce the behaviour:
 1. Create a new post.
 2. Click on "Add Media" button.
 3. Choose "Insert from URL" interface.
 4. Paste a valid YouTube URL: https://www.youtube.com/watch?v=KA_CLal14u4
 5. See the YouTube `<iframe>` with a `600px` width.
 6. Click on "Insert into post" button.
 7. Edit the YouTube video.
 8. See nothing.

 **Expected behaviour**

 The embed content should be displayed.

 **Reason found**

 None. The problem is present in all browsers.

 The Google Chrome console logs `Cross-Origin Read Blocking (CORB) blocked
 cross-origin response https://www.youtube.com/watch?v=KA_CLal14u4 with
 MIME type text/html. See
 https://www.chromestatus.com/feature/5629709824032768 for more details.`.

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Ticket URL: <https://core.trac.wordpress.org/ticket/44705>
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