Set owner-is-canonical based on the primary owner

See #15956 (comment)

CHANGELOG.md

@@ -9,6 +9,7 @@
 - Fixed a bug where Link field query params weren’t working for elements that hadn’t been saved since updating to Craft 5.5.0+. ([#16113](https://github.com/craftcms/cms/issues/16113))
 - Fixed a bug where Live Preview wasn’t reloading after reordering nested entries or addresses. ([#16122](https://github.com/craftcms/cms/issues/16122))
 - Fixed a JavaScript error that could occur when reordering structured elements within an embedded element index. ([#16103](https://github.com/craftcms/cms/issues/16103))
+- Fixed a bug where changes to nested entries/addresses in card view were getting published immediately on save, if the parent element was a draft.
 
 ## 5.5.0.1 - 2024-11-13
 

src/helpers/Cp.php

@@ -909,7 +909,7 @@ private static function baseElementAttributes(ElementInterface $element, array $
                     'field-id' => $element instanceof NestedElementInterface ? $element->getField()?->id : null,
                     'primary-owner-id' => $element instanceof NestedElementInterface ? $element->getPrimaryOwnerId() : null,
                     'owner-id' => $element instanceof NestedElementInterface ? $element->getOwnerId() : null,
-                    'owner-is-canonical' => $element instanceof NestedElementInterface ? $element->getOwner()?->getIsCanonical() : null,
+                    'owner-is-canonical' => $element instanceof NestedElementInterface ? $element->getPrimaryOwner()?->getIsCanonical() : null,
                     'site-id' => $element->siteId,
                     'status' => $element->getStatus(),
                     'label' => (string)$element,