[wp-trac] [WordPress Trac] #56043: WordPress core Lazy Loading filters don't work on featured images

[WordPress Trac]

#56043: WordPress core Lazy Loading filters don't work on featured images
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 Reporter:  culturalistpress  |       Owner:  (none)
     Type:  defect (bug)      |      Status:  new
 Priority:  normal            |   Milestone:  Awaiting Review
Component:  Media             |     Version:  6.0
 Severity:  normal            |  Resolution:
 Keywords:                    |     Focuses:  performance
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Comment (by culturalistpress):

 I have tried a new installation, I haven't really bothered with a default
 theme as I am running Neve.

 You can see the impact even when the theme doesn't leverage featured
 images, just a default blog layout. For example:
 https://pagespeed.web.dev/report?url=https%3A%2F%2Fwww.culturalistpress.com%2Fcategory
 %2Fhome-garden%2F

 The LCP tanks because the top images don't load until everything else is
 done.


 I think you can replicate basically with any fresh WordPress installation
 after 5.7 using a default theme and loading some images in posts above the
 fold. In this case they are all set inside of posts as featured images.

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Ticket URL: <https://core.trac.wordpress.org/ticket/56043#comment:2>
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