Not saving checkboxe "First child" field value in Drupal 10

Here my patch.

Rajan Kumar@2026 → made their first commit to this issue’s fork.

HI Kakoum,

The value is "saved" to menu link options during the validate handler. It was originally in a submit handler, but moved it out. The change is described here: https://www.drupal.org/project/menu_firstchild/issues/3153932#comment-13... →

Could you let me know what other modules you are using on your site? If you look at this issue: https://www.drupal.org/project/menu_firstchild/issues/3407064 🐛 Firstchild checkbox not saved when Mix module is enabled Postponed: needs info , someone used the Mix module, which blows out all options saved to the menu items. Are you using Mix? or perhaps another module is doing the same thing?

Marking as needs more information for now.