diff --git a/src/NHibernate.Test/Async/NHSpecificTest/GH1313/Fixture.cs b/src/NHibernate.Test/Async/NHSpecificTest/GH1313/Fixture.cs
new file mode 100644
index 00000000000..1a5d5f38c88
--- /dev/null
+++ b/src/NHibernate.Test/Async/NHSpecificTest/GH1313/Fixture.cs
@@ -0,0 +1,61 @@
+//------------------------------------------------------------------------------
+// <auto-generated>
+//     This code was generated by AsyncGenerator.
+//
+//     Changes to this file may cause incorrect behavior and will be lost if
+//     the code is regenerated.
+// </auto-generated>
+//------------------------------------------------------------------------------
+
+
+using System;
+using System.Linq;
+using NUnit.Framework;
+using NHibernate.Linq;
+
+namespace NHibernate.Test.NHSpecificTest.GH1313
+{
+	using System.Threading.Tasks;
+	[TestFixture]
+	public class FixtureAsync : BugTestCase
+	{
+		protected override void OnSetUp()
+		{
+			using var session = OpenSession();
+			using var transaction = session.BeginTransaction();
+
+			var account = new Account { Id = 1, Name = "Account_1", OldAccountNumber = 1 };
+			var order = new HoldClose
+			{
+				Account = account,
+				CloseDate = new DateTime(2023, 1, 1)
+			};
+
+			session.Save(account);
+			session.Save(order);
+			transaction.Commit();
+		}
+
+		protected override void OnTearDown()
+		{
+			using var session = OpenSession();
+			using var transaction = session.BeginTransaction();
+
+			session.CreateQuery("delete from System.Object").ExecuteUpdate();
+			transaction.Commit();
+		}
+
+		[Test]
+		[Explicit("Not fixed yet")]
+		public async Task ManyToOneTargettingAFormulaAsync()
+		{
+			using var session = OpenSession();
+			using var transaction = session.BeginTransaction();
+
+			var result = session.Query<HoldClose>();
+
+			Assert.That(await (result.ToListAsync()), Has.Count.EqualTo(1));
+			await (transaction.CommitAsync());
+		}
+	}
+}
diff --git a/src/NHibernate.Test/NHSpecificTest/GH1313/Account.cs b/src/NHibernate.Test/NHSpecificTest/GH1313/Account.cs
new file mode 100644
index 00000000000..55833dc3612
--- /dev/null
+++ b/src/NHibernate.Test/NHSpecificTest/GH1313/Account.cs
@@ -0,0 +1,9 @@
+namespace NHibernate.Test.NHSpecificTest.GH1313
+{
+	public class Account
+	{
+		public virtual int Id { get; set; }
+		public virtual string Name { get; set; }
+		public virtual int OldAccountNumber { get; set; }
+	}
+}
diff --git a/src/NHibernate.Test/NHSpecificTest/GH1313/Fixture.cs b/src/NHibernate.Test/NHSpecificTest/GH1313/Fixture.cs
new file mode 100644
index 00000000000..da097ba72d8
--- /dev/null
+++ b/src/NHibernate.Test/NHSpecificTest/GH1313/Fixture.cs
@@ -0,0 +1,49 @@
+using System;
+using System.Linq;
+using NUnit.Framework;
+
+namespace NHibernate.Test.NHSpecificTest.GH1313
+{
+	[TestFixture]
+	public class Fixture : BugTestCase
+	{
+		protected override void OnSetUp()
+		{
+			using var session = OpenSession();
+			using var transaction = session.BeginTransaction();
+
+			var account = new Account { Id = 1, Name = "Account_1", OldAccountNumber = 1 };
+			var order = new HoldClose
+			{
+				Account = account,
+				CloseDate = new DateTime(2023, 1, 1)
+			};
+
+			session.Save(account);
+			session.Save(order);
+			transaction.Commit();
+		}
+
+		protected override void OnTearDown()
+		{
+			using var session = OpenSession();
+			using var transaction = session.BeginTransaction();
+
+			session.CreateQuery("delete from System.Object").ExecuteUpdate();
+			transaction.Commit();
+		}
+
+		[Test]
+		[Explicit("Not fixed yet")]
+		public void ManyToOneTargettingAFormula()
+		{
+			using var session = OpenSession();
+			using var transaction = session.BeginTransaction();
+
+			var result = session.Query<HoldClose>();
+
+			Assert.That(result.ToList(), Has.Count.EqualTo(1));
+			transaction.Commit();
+		}
+	}
+}
diff --git a/src/NHibernate.Test/NHSpecificTest/GH1313/HoldClose.cs b/src/NHibernate.Test/NHSpecificTest/GH1313/HoldClose.cs
new file mode 100644
index 00000000000..007c768dbb9
--- /dev/null
+++ b/src/NHibernate.Test/NHSpecificTest/GH1313/HoldClose.cs
@@ -0,0 +1,11 @@
+using System;
+
+namespace NHibernate.Test.NHSpecificTest.GH1313
+{
+	public class HoldClose
+	{
+		public virtual int Id { get; set; }
+		public virtual Account Account { get; set; }
+		public virtual DateTime CloseDate { get; set; }
+	}
+}
diff --git a/src/NHibernate.Test/NHSpecificTest/GH1313/Mappings.hbm.xml b/src/NHibernate.Test/NHSpecificTest/GH1313/Mappings.hbm.xml
new file mode 100644
index 00000000000..04b321cd7f6
--- /dev/null
+++ b/src/NHibernate.Test/NHSpecificTest/GH1313/Mappings.hbm.xml
@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" assembly="NHibernate.Test"
+                   namespace="NHibernate.Test.NHSpecificTest.GH1313">
+
+  <class name="HoldClose" >
+    <id name="Id" generator="native"/>
+    <many-to-one name="Account" class="Account" column="accountnumber" property-ref="OldAccountNumber"/>
+    <property name="CloseDate"  />
+  </class>
+  <class name="Account" >
+    <id name="Id" generator="assigned"/>
+    <property name="Name"/>
+    <property name="OldAccountNumber"  insert="false" update="false" generated="never" >
+      <formula>convert(int,substring([Oldaccountnumber],3,8))</formula>
+    </property>
+  </class>
+
+</hibernate-mapping>