efcore.pg: Numeric value does not fit in a System.Decimal

Since build 2.1.0-rtm-ci.305 lazy loading a one-to-many entity collection fails with the following exception:

InvalidOperationException: No row is available
Npgsql.NpgsqlDefaultDataReader.GetFieldValue<T>(int column) in C:\projects\npgsql\src\Npgsql\NpgsqlDefaultDataReader.cs, line 136

Stack
InvalidOperationException: No row is available
Npgsql.NpgsqlDefaultDataReader.GetFieldValue<T>(int column) in C:\projects\npgsql\src\Npgsql\NpgsqlDefaultDataReader.cs
lambda_method(Closure , DbDataReader )
Microsoft.EntityFrameworkCore.Storage.Internal.TypedRelationalValueBufferFactory.Create(DbDataReader dataReader)
Microsoft.EntityFrameworkCore.Query.Internal.QueryingEnumerable<T>+Enumerator.BufferlessMoveNext(DbContext _, bool buffer)
Microsoft.EntityFrameworkCore.Storage.ExecutionStrategy.ExecuteImplementation<TState, TResult>(Func<DbContext, TState, TResult> operation, Func<DbContext, TState, ExecutionResult<TResult>> verifySucceeded, TState state)
Microsoft.EntityFrameworkCore.Query.Internal.QueryingEnumerable<T>+Enumerator.MoveNext()
Microsoft.EntityFrameworkCore.Query.Internal.LinqOperatorProvider._TrackEntities<TOut, TIn>(IEnumerable<TOut> results, QueryContext queryContext, IList<EntityTrackingInfo> entityTrackingInfos, IList<Func<TIn, object>> entityAccessors)+MoveNext()
Microsoft.EntityFrameworkCore.Query.Internal.LinqOperatorProvider+ExceptionInterceptor<T>+EnumeratorExceptionInterceptor.MoveNext()
Microsoft.EntityFrameworkCore.EntityFrameworkQueryableExtensions.Load<TSource>(IQueryable<TSource> source)
Microsoft.EntityFrameworkCore.Internal.EntityFinder<TEntity>.Load(INavigation navigation, InternalEntityEntry entry)
Microsoft.EntityFrameworkCore.Internal.LazyLoader.Load(object entity, string navigationName)
Microsoft.EntityFrameworkCore.Infrastructure.LazyLoaderExtensions.Load<TRelated>(ILazyLoader loader, object entity, ref TRelated navigationField, string navigationName)
[...].Article.get_Statistics() in Article.cs
            get => _statistics ?? LazyLoader?.Load(this, ref _statistics);

Build 2.1.0-rtm-ci.304 works fine without any issues. Since dependencies on Npgsql and EFCore are unchanged between the two builds, this seems to have been introduced with changes between the two builds.

I’m using a simple lazy loader configuration in Article.cs:

        public virtual ICollection<ArticleStatistic> Statistics
        {
            get => _statistics ?? LazyLoader?.Load(this, ref _statistics);
            set => _statistics = value;
        }

        private ICollection<ArticleStatistic> _statistics;

        #region Lazy Loader

        private ILazyLoader LazyLoader { get; set; }

        public Article()
        {
        }

        [UsedImplicitly]
        public Article(ILazyLoader lazyLoader)
        {
            LazyLoader = lazyLoader;
        }

        #endregion

The relationship is not further described with the fluent API, using a standard one-to-many relationship as can be seen in the model snapshot:

            modelBuilder.Entity(
                "[...].ArticleStatistic", b => {
                    b.HasOne("[...].Article", "Entity")
                     .WithMany("Statistics")
                     .HasForeignKey("EntityId")
                     .OnDelete(DeleteBehavior.Cascade);
                });