Query: Nav expansion failed to expand some navigations

[smitpatel]

[ConditionalTheory]
        [MemberData(nameof(IsAsyncData))]
        public virtual Task Manually_created_left_join_propagates_nullability_to_navigations(bool isAsync)
        {
            return AssertQuery<Level1, Level2>(
                isAsync,
                (l1s, l2s) =>
                    from l1_manual in l1s
                    join l2_manual in l2s on l1_manual.Id equals l2_manual.Level1_Optional_Id into grouping
                    from l2_manual in grouping.DefaultIfEmpty()
                    where l2_manual.OneToOne_Required_FK_Inverse2.Name != "L3 02"
                    select l2_manual.OneToOne_Required_FK_Inverse2.Name,
                (l1s, l2s) =>
                    from l1_manual in l1s
                    join l2_manual in l2s on l1_manual.Id equals l2_manual.Level1_Optional_Id into grouping
                    from l2_manual in grouping.DefaultIfEmpty()
                    where Maybe(l2_manual, () => l2_manual.OneToOne_Required_FK_Inverse2.Name) != "L3 02"
                    select Maybe(l2_manual, () => l2_manual.OneToOne_Required_FK_Inverse2.Name));
        }

OneToOne_Required_FK_Inverse2 is not expanded into join.