12451-workaround.cs

// Implement this on your context
public interface IContextDisposedState
{
    bool IsDisposed { get; }
}

public class MyLazyLoader : ILazyLoader
{
    private readonly ILazyLoader _efCoreLazyLoader;
    private readonly ICurrentDbContext _currentContext;

    public HuxleyLazyLoader(ICurrentDbContext currentContext, IDiagnosticsLogger<DbLoggerCategory.Infrastructure> logger)
    {
        _currentContext = currentContext;
        _efCoreLazyLoader = new LazyLoader(currentContext, logger);
    }

    private bool ContextIsDisposed => ((IContextDisposedState)_currentContext.Context).IsDisposed;

    private bool AutoDetectChangesEnabled
    {
        get 
        {
            return _currentContext.Context.ChangeTracker.AutoDetectChangesEnabled;
        }
        set
        {
            _currentContext.Context.ChangeTracker.AutoDetectChangesEnabled = value;
        }
    }

    public void Load(object entity, [CallerMemberName] string navigationName = null)
    {
        if (ContextIsDisposed)
            return;

        var originalChangeTrackingState = AutoDetectChangesEnabled;
        try
        {

            AutoDetectChangesEnabled = false;
            _efCoreLazyLoader.Load(entity, navigationName);
        }
        finally
        {
            if (originalChangeTrackingState)
              AutoDetectChangesEnabled = true;
        }
    }

    public async Task LoadAsync(object entity, CancellationToken cancellationToken = default(CancellationToken), [CallerMemberName] string navigationName = null)
    {
        if (ContextIsDisposed)
            return;

  var originalChangeTrackingState = AutoDetectChangesEnabled;
        try
        {

            AutoDetectChangesEnabled = false;
            await _efCoreLazyLoader.LoadAsync(entity, cancellationToken, navigationName);
        }
        finally
        {
            if (originalChangeTrackingState)
              AutoDetectChangesEnabled = true;
        }
    }
}

// Register the replacement service
new DbContextOptionsBuilder()
   .ReplaceService<ILazyLoader, MyLazyLoader>();