diff -r 7b1b88e27a20 -r 48c4eec2b7e6 wp/wp-admin/js/edit-comments.js
--- a/wp/wp-admin/js/edit-comments.js	Thu Sep 29 08:06:27 2022 +0200
+++ b/wp/wp-admin/js/edit-comments.js	Fri Sep 05 18:40:08 2025 +0200
@@ -1225,7 +1225,7 @@
 	discardCommentChanges: function() {
 		var editRow = $( '#replyrow' );
 
-		if  ( this.originalContent === $( '#replycontent', editRow ).val() ) {
+		if  ( '' === $( '#replycontent', editRow ).val() || this.originalContent === $( '#replycontent', editRow ).val() ) {
 			return true;
 		}