Index: src/js/_enqueues/admin/inline-edit-post.js
===================================================================
--- src/js/_enqueues/admin/inline-edit-post.js	(revision 53347)
+++ src/js/_enqueues/admin/inline-edit-post.js	(working copy)
@@ -294,6 +294,10 @@
 		editRow = $('#inline-edit').clone(true);
 		$( 'td', editRow ).attr( 'colspan', $( 'th:visible, td:visible', '.widefat:first thead' ).length );
 
+		// Remove the ID from the copied row and let the `for` attribute reference the hidden ID.
+		$( 'td', editRow ).find('#quick-edit-legend').removeAttr('id');
+		$( 'td', editRow ).find('p[id^="quick-edit-"]').removeAttr('id');
+
 		$(t.what+id).removeClass('is-expanded').hide().after(editRow).after('<tr class="hidden"></tr>');
 
 		// Populate fields in the quick edit window.
Index: src/wp-admin/includes/class-wp-posts-list-table.php
===================================================================
--- src/wp-admin/includes/class-wp-posts-list-table.php	(revision 53347)
+++ src/wp-admin/includes/class-wp-posts-list-table.php	(working copy)
@@ -1611,9 +1611,9 @@
 			?>
 			<tr id="<?php echo $bulk ? 'bulk-edit' : 'inline-edit'; ?>" class="<?php echo $classes; ?>" style="display: none">
 			<td colspan="<?php echo $this->get_column_count(); ?>" class="colspanchange">
-			<div class="inline-edit-wrapper" role="region" aria-labelledby="inline-edit-legend">
+			<div class="inline-edit-wrapper" role="region" aria-labelledby="<?php echo $bulk ? 'bulk' : 'quick'; ?>-edit-legend">
 			<fieldset class="inline-edit-col-left">
-				<legend class="inline-edit-legend" id="inline-edit-legend"><?php echo $bulk ? __( 'Bulk Edit' ) : __( 'Quick Edit' ); ?></legend>
+				<legend class="inline-edit-legend" id="<?php echo $bulk ? 'bulk' : 'quick'; ?>-edit-legend"><?php echo $bulk ? __( 'Bulk Edit' ) : __( 'Quick Edit' ); ?></legend>
 				<div class="inline-edit-col">
 
 				<?php if ( post_type_supports( $screen->post_type, 'title' ) ) : ?>