prevent creation of unnecessary provisional draft after full save

CHANGELOG.md

@@ -22,6 +22,7 @@
 - Fixed an error that occurred when loading a soft-deleted nested entry from a revision. ([#15930](https://github.com/craftcms/cms/pull/15930))
 - Fixed a bug where the `entrify/tags` and `entrify/global-set` commands would prompt for the target section after one had just been created.
 - Fixed a bug where `entrify` commands weren’t copying the original field instance UUIDs into newly-created entry types, causing content to appear missing. ([#15935](https://github.com/craftcms/cms/issues/15935))
+- Fixed a bug where element editor slideouts could create unnecessary provisional drafts. ([#15938](https://github.com/craftcms/cms/issues/15938))
 - Fixed an information disclosure vulnerability.
 
 ## 5.4.8 - 2024-10-15

src/web/assets/cp/src/js/ElementEditor.js

@@ -2067,6 +2067,10 @@ Craft.ElementEditor = Garnish.Base.extend(
         } finally {
           this.submittingForm = false;
           this.trigger('afterSubmit');
+
+          // after fully saving the element in a slideout, trigger checkForm but without creating a draft
+          // see https://github.com/craftcms/cms/issues/15938
+          this.checkForm(false, false);
         }
 
         if (this.settings.isUnpublishedDraft) {