[wp-trac] [WordPress Trac] #48698: Update fails if there’s a "Custom Html" block and an Iframe inside it

[WordPress Trac]

#48698: Update fails if there’s a "Custom Html" block and an Iframe inside it
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 Reporter:  ozgurnevres   |       Owner:  (none)
     Type:  defect (bug)  |      Status:  new
 Priority:  normal        |   Milestone:  Awaiting Review
Component:  Editor        |     Version:  5.3
 Severity:  normal        |  Resolution:
 Keywords:                |     Focuses:
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Comment (by JarretC):

 Thanks! I tried out that code as well and didn't have any issues getting
 it added/saved into the post.

 Is that the only content/block on the post/page or do you have other stuff
 in there? Also, did you deactivate all active plugins and try using a
 default theme as well?

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Ticket URL: <https://core.trac.wordpress.org/ticket/48698#comment:3>
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