[wp-trac] [WordPress Trac] #52109: 5.6 causes custom blocks to disappear

[WordPress Trac]

#52109: 5.6 causes custom blocks to disappear
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 Reporter:  sawdusttech   |      Owner:  (none)
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  General       |    Version:  5.6
 Severity:  normal        |   Keywords:  needs-patch
  Focuses:                |
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 Updating to 5.6 has made some custom blocks disappear even though others
 in the same folder are still available. Written in ES5. A downgrade to
 just the wp-includes 5.5.3 has them all come back. Other people are also
 having this issue. Tried disabling all plugins.  Frontend works fine.

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Ticket URL: <https://core.trac.wordpress.org/ticket/52109>
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