diff --git a/src/wp-includes/js/media-views.js b/src/wp-includes/js/media-views.js
index 5d2fe60..bcee5ae 100644
--- a/src/wp-includes/js/media-views.js
+++ b/src/wp-includes/js/media-views.js
@@ -3566,6 +3566,8 @@ Attachments = View.extend({
 
 			// Record the initial `index` of the dragged model.
 			start: function( event, ui ) {
+				// trigger the blur on any caption inputs currently in focus
+				$( 'input.describe:focus').trigger( 'blur' );
 				ui.item.data('sortableIndexStart', ui.item.index());
 			},
 
-- 
2.2.2