Description

Whenever I try to add a gallery image in the Gutenberg editor, the selected image appears in Full Size, but in the resolution selector, it shows as Thumbnail Size. The expected behaviour is that the selector should reflect the chosen Full Size image.

Expected Behaviour:
The image preview in the media selector should show the actual image size (Full Size).
Actual Behaviour:
The media selector displays the image in Thumbnail Size, even when the actual inserted image is in Full Size (according to the image resolutions ).

Step-by-step reproduction instructions

• Open any POST or PAGE.
• Add a Gallery block.
• Choose an image through upload or media library .
• When an image is inserted into the editor, observe that the selected image appears in Full Size in the gallery, but in the media selector, it incorrectly displays as Thumbnail Size.
• Check image resolution by page inspect and notice the difference .

Screenshots, screen recording, code snippet

Environment info

WordPress Version: 6.8
Gutenberg Version: 20.2.0-rc.1
Theme: Twenty Twenty-Four
Browser: Chrome
OS: Mac

Please confirm that you have searched existing issues in the repo.

• Yes

Please confirm that you have tested with all plugins deactivated except Gutenberg.

• Yes

Please confirm which theme type you used for testing.

• Block
• Classic
• Hybrid (e.g. classic with theme.json)
• Not sure