[wp-trac] [WordPress Trac] #56652: New Template Part block content isn't saved when saving a post draft in 6.1

[WordPress Trac]

#56652: New Template Part block content isn't saved when saving a post draft in 6.1
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 Reporter:  ashleyleia    |      Owner:  (none)
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  Editor        |    Version:
 Severity:  normal        |   Keywords:
  Focuses:                |
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 When adding a new "Template Part" block to a post in the block editor, any
 content that's added to that block isn't saved when the user saves a draft
 of the post; it only saves if a user clicks Publish. After saving a draft
 and refreshing the screen, the content is replaced with an empty Template
 Part block that can't be edited.

 Steps to reproduce:
 1) Create a new post.
 2) Add a "Template Part" block.
 3) Select "Start blank", and give the template a name.
 4) Within the template block, create a paragraph block and add some text.
 5) Save the post draft.
 6) Refresh the page. An alert will pop up confirming you want to leave the
 page with unsaved changes. After the page refreshes, there's an un-
 editable empty template block as in the attached screenshot.

 I'm using 6.1 Beta 1 with no active plugins on MacOS in both Chrome and
 Safari. Tested with Twenty Twenty-Three, Twenty-Two, and Twenty-One.

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Ticket URL: <https://core.trac.wordpress.org/ticket/56652>
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