Query: compilation error for query projecting collection followed by FirstOrDefault accessing another collection

[maumar]

query:

ss.Set<Level1>()
                    .Where(l1 => l1.Id < 2)
                    .Select(l1 => new
                    {
                        l1.Id,
                        Pushdown = l1.OneToMany_Optional1
                            .Where(x => x.Name == "L2 02")
                            .FirstOrDefault().OneToMany_Optional2.ToList()
                    })

exception:

GenericArguments[2], 'System.Collections.Generic.ICollection`1[Microsoft.EntityFrameworkCore.TestModels.ComplexNavigationsModel.Level3]', on 'Void PopulateCollection[TCollection,TElement,TRelatedEntity](Int32, Microsoft.EntityFrameworkCore.Query.QueryContext, System.Data.Common.DbDataReader, Microsoft.EntityFrameworkCore.Query.Internal.SingleQueryResultCoordinator, System.Func`3[Microsoft.EntityFrameworkCore.Query.QueryContext,System.Data.Common.DbDataReader,System.Object[]], System.Func`3[Microsoft.EntityFrameworkCore.Query.QueryContext,System.Data.Common.DbDataReader,System.Object[]], System.Func`3[Microsoft.EntityFrameworkCore.Query.QueryContext,System.Data.Common.DbDataReader,System.Object[]], System.Collections.Generic.IReadOnlyList`1[Microsoft.EntityFrameworkCore.ChangeTracking.ValueComparer], System.Collections.Generic.IReadOnlyList`1[Microsoft.EntityFrameworkCore.ChangeTracking.ValueComparer], System.Collections.Generic.IReadOnlyList`1[Microsoft.EntityFrameworkCore.ChangeTracking.ValueComparer], System.Func`5[Microsoft.EntityFrameworkCore.Query.QueryContext,System.Data.Common.DbDataReader,Microsoft.EntityFrameworkCore.Query.Internal.ResultContext,Microsoft.EntityFrameworkCore.Query.Internal.SingleQueryResultCoordinator,TRelatedEntity])' violates the constraint of type 'TRelatedEntity'.
    ---- System.Security.VerificationException : Method Microsoft.EntityFrameworkCore.Query.RelationalShapedQueryCompilingExpressionVisitor+ShaperProcessingExpressionVisitor.PopulateCollection: type argument 'System.Collections.Generic.ICollection`1[Microsoft.EntityFrameworkCore.TestModels.ComplexNavigationsModel.Level3]' violates the constraint of type parameter 'TRelatedEntity'.
  Stack Trace: 
    RuntimeType.ValidateGenericArguments(MemberInfo definition, RuntimeType[] genericArguments, Exception e)
    RuntimeMethodInfo.MakeGenericMethod(Type[] methodInstantiation)
    ShaperProcessingExpressionVisitor.VisitExtension(Expression extensionExpression) line 755
    ShaperProcessingExpressionVisitor.ProcessShaper(Expression shaperExpression, RelationalCommandCache& relationalCommandCache, LambdaExpression& relatedDataLoaders) line 277
    RelationalShapedQueryCompilingExpressionVisitor.VisitShapedQuery(ShapedQueryExpression shapedQueryExpression) line 64
    ShapedQueryCompilingExpressionVisitor.VisitExtension(Expression extensionExpression) line 95
    QueryCompilationContext.CreateQueryExecutor[TResult](Expression query) line 179
    Database.CompileQuery[TResult](Expression query, Boolean async) line 72
    QueryCompiler.CompileQueryCore[TResult](IDatabase database, Expression query, IModel model, Boolean async) line 112
    <>c__DisplayClass9_0`1.<Execute>b__0() line 96
    CompiledQueryCache.GetOrAddQuery[TResult](Object cacheKey, Func`1 compiler) line 76
    QueryCompiler.Execute[TResult](Expression query) line 92
    EntityQueryProvider.Execute[TResult](Expression expression) line 79
    EntityQueryable`1.GetEnumerator() line 91
    List`1.ctor(IEnumerable`1 collection)