shouldUpdateThumbnail does not update thumbnail is source field changed

Existing MR needs rebase.

@mglaman, could you confirm if this issue is still relevant? I’m unable to reproduce it.

1. I created a media item of type Image and the thumbnail displays correctly on /admin/content/media, which is the expected behavior.
2. If I update the field_media_image field (the source field), the thumbnail updates as expected on /admin/content/media. This aligns with the behavior I’ve always observed.
3. Thinking you might be referring to changing the media source field on the media type configuration, I attempted that, but it’s not allowed for an existing media type.

It looks like this restriction was introduced at least as early as 2017/12/12, so I’m guessing you’re not referring to that scenario.

I might be missing something here. Could you clarify? :D

vidorado → changed the visibility of the branch 11.x to hidden.

vidorado → changed the visibility of the branch 3293135-shouldupdatethumbnail-does-not to hidden.