Ticket #28704: 28704.2.diff

src/wp-includes/js/media-views.js

@@ -4753 +4753 @@
                         var method;
 
                         // Catch arrow events
-                        if ( 37 === event.keyCode || 38 === event.keyCode || 39 === event.keyCode || 40 === event.keyCode ) {
+                        if ( 'input' !== event.target.tagName.toLowerCase() && ( 37 === event.keyCode || 38 === event.keyCode || 39 === event.keyCode || 40 === event.keyCode ) ) {
                                 this.arrowEvent(event);
                                 return;
                         }