Merge pull request #14738 from craftcms/bugfix/14731-group-params-by-…

…delta-names

go from most to least specific delta names

CHANGELOG.md

@@ -19,6 +19,7 @@
 - Fixed an error that could occur when creating a passkey. ([#14745](https://github.com/craftcms/cms/issues/14745))
 - Fixed a bug where the “Utilities” global nav item could get two badge counts.
 - Fixed a bug where custom fields whose previous types were missing would lose their values when updating to Craft 5.
+- Fixed a bug where Dropdown fields could be marked as invalid on save, if the saved value was invalid and they were initially marked as changed (to the default value) on page load. ([#14738](https://github.com/craftcms/cms/pull/14738))
 
 ## 5.0.0 - 2024-03-26
 

src/web/assets/cp/src/js/Craft.js

@@ -1205,6 +1205,9 @@ $.extend(Craft, {
       grouped.__root__ = [];
     }
 
+    // sort delta names from most to least specific
+    deltaNames = deltaNames.sort((a, b) => b.length - a.length);
+
     for (let name of deltaNames) {
       grouped[name] = [];
     }
@@ -1215,7 +1218,6 @@ $.extend(Craft, {
     params = params.map((p) => decodeURIComponent(p));
 
     paramLoop: for (let param of params) {
-      // loop through the delta names from most -> least specific
       for (let name of deltaNames) {
         const paramName = param.substring(0, name.length + 1);
         if ([`${name}=`, `${name}[`].includes(paramName)) {