[wp-trac] [WordPress Trac] #54575: Provide guidance to users seeking to preview block themes on WordPress versions below 5.9

[WordPress Trac]

#54575: Provide guidance to users seeking to preview block themes on WordPress
versions below 5.9
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 Reporter:  kjellr        |       Owner:  (none)
     Type:  defect (bug)  |      Status:  new
 Priority:  normal        |   Milestone:  5.9
Component:  General       |     Version:
 Severity:  normal        |  Resolution:
 Keywords:  needs-patch   |     Focuses:
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Comment (by kafleg):

 Tested this in various ways. See the discussion and findings in
 [https://wordpress.slack.com/archives/C03B0H5J0/p1638886803431900 #core-
 test].

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Ticket URL: <https://core.trac.wordpress.org/ticket/54575#comment:7>
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