diff --git a/includes/classes/Indexable/Post/Post.php b/includes/classes/Indexable/Post/Post.php
index 13d8f9690c..b17dcd8ae9 100644
--- a/includes/classes/Indexable/Post/Post.php
+++ b/includes/classes/Indexable/Post/Post.php
@@ -1996,7 +1996,19 @@ protected function parse_date( $args ) {
 	 * @return array
 	 */
 	protected function parse_meta_queries( $args ) {
-		$meta_queries = [];
+		/**
+		 * 'meta_query' arg support.
+		 *
+		 * Relation supports 'AND' and 'OR'. 'AND' is the default. For each individual query, the
+		 * following 'compare' values are supported: =, !=, EXISTS, NOT EXISTS. '=' is the default.
+		 *
+		 * @since 1.3
+		 */
+		$meta_queries = ( ! empty( $args['meta_query'] ) ) ? $args['meta_query'] : [];
+
+		/**
+		 * Todo: Support meta_type
+		 */
 
 		/**
 		 * Support `meta_key`, `meta_value`, `meta_value_num`, and `meta_compare` query args
@@ -2016,32 +2028,18 @@ protected function parse_meta_queries( $args ) {
 				$meta_query_array['compare'] = $args['meta_compare'];
 			}
 
-			$meta_queries[] = $meta_query_array;
-		}
-
-		/**
-		 * Todo: Support meta_type
-		 */
-
-		/**
-		 * 'meta_query' arg support.
-		 *
-		 * Relation supports 'AND' and 'OR'. 'AND' is the default. For each individual query, the
-		 * following 'compare' values are supported: =, !=, EXISTS, NOT EXISTS. '=' is the default.
-		 *
-		 * @since 1.3
-		 */
-		if ( ! empty( $args['meta_query'] ) ) {
-			$meta_queries = array_merge( $meta_queries, $args['meta_query'] );
+			if ( ! empty( $meta_queries ) ) {
+				$meta_queries = [
+					'relation' => 'AND',
+					$meta_query_array,
+					$meta_queries,
+				];
+			} else {
+				$meta_queries = [ $meta_query_array ];
+			}
 		}
 
 		if ( ! empty( $meta_queries ) ) {
-
-			$relation = 'must';
-			if ( ! empty( $args['meta_query'] ) && ! empty( $args['meta_query']['relation'] ) && 'or' === strtolower( $args['meta_query']['relation'] ) ) {
-				$relation = 'should';
-			}
-
 			// get meta query filter
 			$meta_filter = $this->build_meta_query( $meta_queries );
 
diff --git a/tests/php/indexables/TestPost.php b/tests/php/indexables/TestPost.php
index ffc12b9daa..b195c3bdd6 100644
--- a/tests/php/indexables/TestPost.php
+++ b/tests/php/indexables/TestPost.php
@@ -3066,6 +3066,75 @@ public function testMetaQueryOrRelation() {
 		$this->assertEquals( 2, $query->found_posts );
 	}
 
+	/**
+	 * Test an advanced meta filter query with or relation while sorting by Meta key
+	 *
+	 * @since 4.4.0
+	 * @group post
+	 */
+	public function testMetaQueryOrRelationWithSort() {
+		$this->ep_factory->post->create(
+			array(
+				'post_content' => 'the post content findme',
+				'meta_input'   => array( 'test_key' => date('Ymd') - 5 ),
+			),
+		);
+		$this->ep_factory->post->create(
+			array(
+				'post_content' => 'the post content findme',
+				'meta_input'   => array(
+					'test_key'  => date('Ymd') + 5,
+					'test_key2' => date('Ymd') + 6,
+				),
+			),
+		);
+		$this->ep_factory->post->create(
+			array(
+				'post_content' => 'the post content findme',
+				'meta_input'   => array(
+					'test_key'  => date('Ymd') + 5,
+					'test_key2' => date('Ymd') + 6,
+				),
+			),
+		);
+
+		$post = new \ElasticPress\Indexable\Post\Post();
+		ElasticPress\Elasticsearch::factory()->refresh_indices();
+		$args = array(
+			'ep_integrate' => true,
+			'meta_key' => 'test_key',
+			'meta_query' => array(
+				'relation' => 'or',
+				array(
+					'key'     => 'test_key',
+					'value'   => date('Ymd'),
+					'compare' => '<=',
+					'type' => 'NUMERIC',
+				),
+				array(
+					'key'     => 'test_key2',
+					'value'   => date('Ymd'),
+					'compare' => '>=',
+					'type' => 'NUMERIC',
+				),
+			),
+			'orderby' => 'meta_value_num',
+			'order' => 'ASC',
+		);
+
+		$query = new \WP_Query( $args );
+		$args = $post->format_args($args, new \WP_Query() );
+
+		$outer_must = $args['post_filter']['bool']['must'][0]['bool']['must'];
+
+		$this->assertTrue( $query->elasticsearch_success );
+		$this->assertEquals( 3, $query->post_count );
+		$this->assertEquals( 3, $query->found_posts );
+		$this->assertSame( 'meta.test_key', $outer_must[0]['exists']['field'] );
+		$this->assertArrayHasKey( 'meta.test_key.long', $outer_must[1]['bool']['should']['bool']['should'][0]['bool']['must'][0]['range'] );
+		$this->assertArrayHasKey( 'meta.test_key2.long', $outer_must[1]['bool']['should']['bool']['should'][1]['bool']['must'][0]['range'] );
+	}
+
 	/**
 	 * Test an advanced meta filter query
 	 *