[wp-trac] [WordPress Trac] #62447: WP 6.7 Block Editor converting new PNG uploads to JPEG with mangled backgrounds

[WordPress Trac]

#62447: WP 6.7 Block Editor converting new PNG uploads to JPEG with mangled
backgrounds
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 Reporter:  room34        |      Owner:  (none)
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  Editor        |    Version:  6.7
 Severity:  normal        |   Keywords:
  Focuses:                |
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 I’m finding that if I upload a PNG with a transparent background (which is
 the only reason I use PNG most of the time) in the Block Editor, it’s
 getting converted to a JPEG with the transparency either turned black or
 some kind of distorted color blocks from the foreground elements of the
 image.

 If I go into the Media Library and look at the images that were uploaded,
 the **Original image** link is not to the original PNG version of the
 image, but a HEIC file with a name like `tempImage1fPWE9.heic` and then
 that has been converted to a JPEG (e.g. `tempImage1fPWE9.jpg`) for display
 on the site.

 If I upload the PNG directly in the Media Library, it uploads normally.
 This problem is only happening in the Block Editor. I confirmed it is
 happening on a site running WordPress 6.7 using the Twenty Twenty Five
 theme and no plugins active.

 I saw in the release notes that 6.7 has added support for HEIC images, but
 I am not uploading HEIC images, they are definitely PNGs on my computer.

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Ticket URL: <https://core.trac.wordpress.org/ticket/62447>
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