3475457: Fix focus issue in layout builder

Closes #3475457

core/misc/dialog/dialog.ajax.js

@@ -44,7 +44,14 @@
           if (!$dialog[0].contains(document.activeElement)) {
             // Move focus to the first focusable element in the next event loop
             // to allow dialog buttons to be changed first.
-            $dialog.dialog('instance')._focusedElement = null;
+            const $focusedElement = $dialog.dialog('instance')._focusedElement;
+            if (
+              $focusedElement.hasClass('field--type-image') &&
+              $focusedElement.hasClass('paragraph-top') &&
+              $focusedElement.hasClass('form-item--multiple')
+            ) {
+              $dialog.dialog('instance')._focusedElement = null;
+            }
             $dialog.dialog('instance')._focusTabbable();
           }
         }, 0);