[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 SergeyBiryukov):

 Hi there, welcome to WordPress Trac! Thanks for the report.

 Just noting that this sounds like an issue triggered by a plugin or some
 overzealous security rule on the server.

 Some similar issues: #25564, #25736, #32571, #33160, #44861, #45368,
 #48673.

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Ticket URL: <https://core.trac.wordpress.org/ticket/48698#comment:4>
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