diff --git a/src/js/_enqueues/admin/inline-edit-post.js b/src/js/_enqueues/admin/inline-edit-post.js
index 65cd342c284b2..9d6f66c3b0034 100644
--- a/src/js/_enqueues/admin/inline-edit-post.js
+++ b/src/js/_enqueues/admin/inline-edit-post.js
@@ -128,8 +128,16 @@ window.wp = window.wp || {};
 			inlineEditPost.edit( this );
 		});
 
+		// Clone quick edit categories for the bulk editor.
+		var beCategories = $( '#inline-edit fieldset.inline-edit-categories' ).clone();
+
+		// Make "id" attributes globally unique.
+		beCategories.find( '*[id]' ).each( function() {
+			this.id = 'bulk-edit-' + this.id;
+		});
+
 		$('#bulk-edit').find('fieldset:first').after(
-			$('#inline-edit fieldset.inline-edit-categories').clone()
+			beCategories
 		).siblings( 'fieldset:last' ).prepend(
 			$( '#inline-edit .inline-edit-tags-wrap' ).clone()
 		);
diff --git a/src/wp-admin/css/list-tables.css b/src/wp-admin/css/list-tables.css
index de36190b51e4c..e06793ea6b12b 100644
--- a/src/wp-admin/css/list-tables.css
+++ b/src/wp-admin/css/list-tables.css
@@ -1131,7 +1131,7 @@ tr.inline-edit-row td {
 	width: 75%;
 }
 
-.inline-edit-row #post_parent,
+.inline-edit-row select[name="post_parent"],
 .inline-edit-row select[name="page_template"] {
 	max-width: 80%;
 }
diff --git a/src/wp-admin/includes/class-walker-category-checklist.php b/src/wp-admin/includes/class-walker-category-checklist.php
index 1deb3f9206932..7960d06114c3a 100644
--- a/src/wp-admin/includes/class-walker-category-checklist.php
+++ b/src/wp-admin/includes/class-walker-category-checklist.php
@@ -107,11 +107,13 @@ public function start_el( &$output, $data_object, $depth = 0, $args = array(), $
 				/** This filter is documented in wp-includes/category-template.php */
 				esc_html( apply_filters( 'the_category', $category->name, '', '' ) ) . '</div>';
 		} else {
-			$is_selected = in_array( $category->term_id, $args['selected_cats'], true );
-			$is_disabled = ! empty( $args['disabled'] );
+			$is_selected         = in_array( $category->term_id, $args['selected_cats'], true );
+			$is_disabled         = ! empty( $args['disabled'] );
+			$li_element_id       = wp_unique_prefixed_id( "in-{$taxonomy}-{$category->term_id}-" );
+			$checkbox_element_id = wp_unique_prefixed_id( "in-{$taxonomy}-{$category->term_id}-" );
 
-			$output .= "\n<li id='{$taxonomy}-{$category->term_id}'$class>" .
-				'<label class="selectit"><input value="' . $category->term_id . '" type="checkbox" name="' . $name . '[]" id="in-' . $taxonomy . '-' . $category->term_id . '"' .
+			$output .= "\n<li id='" . esc_attr( $li_element_id ) . "'$class>" .
+				'<label class="selectit"><input value="' . $category->term_id . '" type="checkbox" name="' . $name . '[]" id="' . esc_attr( $checkbox_element_id ) . '"' .
 				checked( $is_selected, true, false ) .
 				disabled( $is_disabled, true, false ) . ' /> ' .
 				/** This filter is documented in wp-includes/category-template.php */
diff --git a/src/wp-admin/includes/class-wp-posts-list-table.php b/src/wp-admin/includes/class-wp-posts-list-table.php
index 1c6ae83119a30..1e27b931ab01b 100644
--- a/src/wp-admin/includes/class-wp-posts-list-table.php
+++ b/src/wp-admin/includes/class-wp-posts-list-table.php
@@ -1842,6 +1842,7 @@ public function inline_edit() {
 
 							if ( $bulk ) {
 								$dropdown_args['show_option_no_change'] = __( '&mdash; No Change &mdash;' );
+								$dropdown_args['id']                    = 'bulk_edit_post_parent';
 							}
 
 							/**