diff --git a/hibernate-core/src/main/java/org/hibernate/type/descriptor/jdbc/ArrayJdbcType.java b/hibernate-core/src/main/java/org/hibernate/type/descriptor/jdbc/ArrayJdbcType.java
index 36be6570faf5..47e97626e141 100644
--- a/hibernate-core/src/main/java/org/hibernate/type/descriptor/jdbc/ArrayJdbcType.java
+++ b/hibernate-core/src/main/java/org/hibernate/type/descriptor/jdbc/ArrayJdbcType.java
@@ -190,8 +190,11 @@ protected Object[] getArray(
 	}
 
 	protected <X> X getArray(BasicExtractor<X> extractor, java.sql.Array array, WrapperOptions options) throws SQLException {
-		if ( array != null && getElementJdbcType() instanceof AggregateJdbcType ) {
-			final AggregateJdbcType aggregateJdbcType = (AggregateJdbcType) getElementJdbcType();
+		final JdbcType jdbcType = getElementJdbcType();
+		if (array != null
+				&& jdbcType instanceof AggregateJdbcType
+				&& ((AggregateJdbcType) jdbcType).getEmbeddableMappingType() != null) {
+			final AggregateJdbcType aggregateJdbcType = (AggregateJdbcType) jdbcType;
 			final EmbeddableMappingType embeddableMappingType = aggregateJdbcType.getEmbeddableMappingType();
 			final Object rawArray = array.getArray();
 			final Object[] domainObjects = new Object[Array.getLength( rawArray )];
diff --git a/hibernate-core/src/test/java/org/hibernate/orm/test/function/array/ArrayAggregateTest.java b/hibernate-core/src/test/java/org/hibernate/orm/test/function/array/ArrayAggregateTest.java
index 26b4c00f6bba..7f2d30803873 100644
--- a/hibernate-core/src/test/java/org/hibernate/orm/test/function/array/ArrayAggregateTest.java
+++ b/hibernate-core/src/test/java/org/hibernate/orm/test/function/array/ArrayAggregateTest.java
@@ -1,11 +1,10 @@
 /*
- * Hibernate, Relational Persistence for Idiomatic Java
- *
- * License: GNU Lesser General Public License (LGPL), version 2.1 or later.
- * See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
+ * SPDX-License-Identifier: Apache-2.0
+ * Copyright Red Hat Inc. and Hibernate Authors
  */
 package org.hibernate.orm.test.function.array;
 
+import java.util.Arrays;
 import java.util.List;
 
 import org.hibernate.boot.ResourceStreamLocator;
@@ -14,12 +13,14 @@
 import org.hibernate.boot.spi.InFlightMetadataCollector;
 import org.hibernate.boot.spi.MetadataBuildingContext;
 import org.hibernate.dialect.OracleArrayJdbcType;
+import org.hibernate.dialect.PostgreSQLDialect;
 import org.hibernate.dialect.OracleDialect;
 import org.hibernate.dialect.SpannerDialect;
 import org.hibernate.engine.jdbc.Size;
 import org.hibernate.query.criteria.JpaCriteriaQuery;
 import org.hibernate.query.criteria.JpaRoot;
 import org.hibernate.query.sqm.NodeBuilder;
+import org.hibernate.testing.orm.junit.RequiresDialect;
 import org.hibernate.type.SqlTypes;
 import org.hibernate.type.descriptor.java.ArrayJavaType;
 import org.hibernate.type.descriptor.java.spi.JavaTypeRegistry;
@@ -37,6 +38,7 @@
 import org.hibernate.testing.orm.junit.SessionFactory;
 import org.hibernate.testing.orm.junit.SessionFactoryScope;
 import org.hibernate.testing.orm.junit.SkipForDialect;
+import org.hibernate.testing.orm.junit.Jira;
 import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
@@ -172,4 +174,21 @@ public void testNonExistingArrayType(SessionFactoryScope scope) {
 		} );
 	}
 
+	@Test
+	@Jira("https://hibernate.atlassian.net/browse/HHH-19681")
+	@RequiresDialect(PostgreSQLDialect.class)
+	public void testJsonBJdbcArray(SessionFactoryScope scope) {
+		scope.inTransaction( session -> {
+			String sql = "select groupId, array_agg(json_values) " +
+					"from (VALUES (1,'[1,2]'::jsonb),(1,'[10,20]'::jsonb)) as row(groupId,json_values) " +
+					"group by groupId";
+
+			List<Object[]> result = session.createNativeQuery(sql, Object[].class).getResultList();
+			assertEquals(1,result.size());
+			assertEquals(2, result.get(0).length);
+			assertEquals( 1,result.get(0)[0] );
+			assertEquals( "[[1, 2], [10, 20]]", Arrays.toString((String[])result.get(0)[1]) );
+		} );
+	}
+
 }