graphql-platform: Synchronized DbContext is not synchronized in data loaders

Is there an existing issue for this?

• I have searched the existing issues

Describe the bug

Have a data loader tha uses DbContext:

public class EntityByIdDataLoader<TEntity>: BatchDataLoaderWithDbContext<int, TEntity>
    where TEntity : class, IEntity
{
    public EntityByIdDataLoader(CommonDbContext dbContext, IBatchScheduler batchScheduler, DataLoaderOptions? options = null) 
        : base(dbContext, batchScheduler, options)
    {
    }

    protected override async Task<IReadOnlyDictionary<int, TEntity>> LoadBatchAsync(IReadOnlyList<int> keys,
        CommonDbContext dbContext, CancellationToken cancellationToken)
        => await dbContext.Set<TEntity>().Where(e => keys.Contains(e.Id)).ToDictionaryAsync(k => k.Id, k => k, cancellationToken);
}

Have a resolver that uses two of these loaders:

    [GraphQLType(typeof(UserNoteRelatedEntityUnionType))]
    public async Task<object?> GetRelatedEntityAsync([Parent] UserNote parent,
        [DataLoader] EntityByIdDataLoader<Instrument> instrumentLoader,
        [DataLoader] EntityByIdDataLoader<Instruction> instructionLoader,
        [Service] IMapper mapper,
        CancellationToken token)
        => parent.RelatedEntityType switch
        {
            UserNoteRelatedEntityType.Instrument => await instrumentLoader.LoadAsync(parent.RelatedEntityId!.Value, token),
            UserNoteRelatedEntityType.Instruction => 
                mapper.Map<ViewInstruction>(await instructionLoader.LoadAsync(parent.RelatedEntityId!.Value, token)),
            _ => null,
        };

Occasionaly get:

A second operation was started on this context instance before a previous operation completed. This is usually caused by different threads concurrently using the same instance of DbContext. For more information on how to avoid threading issues with DbContext, see https://go.microsoft.com/fwlink/?linkid=2097913.

on path

[
  "userNotes",
  "nodes",
  2,
  "relatedEntity"
]

Steps to reproduce

1. See above

Relevant log output

No response

Additional Context?

DbContext is registered as synchronized:

services.AddGraphQLServer().RegisterDbContext<CommonDbContext>(DbContextKind.Synchronized);

I thought I could enforce synchronization by adding DbContext explicitly as a parameter of the resover. However, this leads to endlessly running query.

Product

Hot Chocolate

Version

12.9.0