[wp-trac] [WordPress Trac] #65098: get_site_icon_url() returns empty string even when fallback is defined, breaking wp-embed-site-icon in the_embed_site_title()

[WordPress Trac]

#65098: get_site_icon_url() returns empty string even when fallback is defined,
breaking wp-embed-site-icon in the_embed_site_title()
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 Reporter:  pontocinza               |       Owner:  (none)
     Type:  defect (bug)             |      Status:  new
 Priority:  normal                   |   Milestone:  7.1
Component:  Embeds                   |     Version:
 Severity:  normal                   |  Resolution:
 Keywords:  has-patch has-test-info  |     Focuses:
-------------------------------------+---------------------
Changes (by abcd95):

 * keywords:  has-patch => has-patch has-test-info


Comment:

 == Test Report

 === Description
 This report validates whether the indicated patch works as expected.
 Patch tested: https://github.com/WordPress/wordpress-develop/pull/11601

 === Environment
 - WordPress: 7.1-alpha-62161-src
 - PHP: 8.3.30
 - Server: nginx/1.29.8
 - Database: mysqli (Server: 8.4.8 / Client: mysqlnd 8.3.30)
 - Browser: Chrome 147.0.0.0
 - OS: macOS
 - Theme: Twenty Twenty-Five 1.4

 === Reproduction Steps

 1. Created a test post ("Test Embed Post") and visited
 `/?p={postID}&embed=true`
 2. Simulated broken get_site_icon_url()
    via add_filter( 'get_site_icon_url', '__return_empty_string' )
 3. Confirmed bug: <img src="" srcset=" 2x"> in the embed footer
 4. Applied patch from PR #11601
 5. Re-tested the same embed URL

 === Actual Results

 ✅ The issue is resolved after applying the patch.


 === Supplemental Artifacts

 Before patch

 [[Image(https://i.ibb.co/Y7vF0mhc/Screenshot-2026-04-21-at-22-49-06.png)]]

 After patch

 [[Image(https://i.ibb.co/XrdB3Stg/Screenshot-2026-04-21-at-22-48-04.png)]]

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Ticket URL: <https://core.trac.wordpress.org/ticket/65098#comment:8>
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