Site icon not working in "Customize" section

[alesub]

After the site icon was added to Settings > General, the icon is still an editable field at Appearance > Customize, but over there after you go through the process of saving the icon, the change is not really saved. Reloading the page or revisiting it show an empty field.

[jorbin]

I tried to replicate this on trunk with twenty-twenty-one and am able to update the site icon in both locations using the following steps:

1. Choose an icon on wp-admin/options-general.php and hit save. See the correct icon referenced in the code on the homepage.
2. Navigate to wp-admin/customize.php and update the icon. Hit publish. See the new icon referenced in the code on the homepage.

Are you able to replicate this with all plugins deactivated while using one of the default themes?

[alesub]

Thanks for te quick reply @jorbin, after testing this on a clean site, I can see that the bug is not present anymore. So the problem should be caused by a theme or plugin. I'm closing the ticket.