ConcurrencyCheck attribute to property not updating Column value in database while using EF core Bulk extension

Question

Class: RequestStatus Column is annoted for ConcurrencyCheck

public class Entity 
{  
    public string TicketNumber { get; set; }

    [ConcurrencyCheck]
    public string RequestStatus { get; set; }

    //Other Properties here
}

I am using BulkInsertUpdate EF core method to update main entity and its child entites as:

protected async Task BulkUpdate(Entity[]] entities, User user)
{
    string sessionGUID = Guid.NewGuid().ToString();
    Entity entity = entities.Where(f => f.isMainEntity == true).First();

    // validations
    if (entities.Any(f =>!string.IsNullOrEmpty(f.flag?.Trim()))
    {
        throw new Exception();
    }

     // Main Entity
    entity.ReviewerId = user.UserId;
    entity.status = Entity.status.Value ? true : false;

    if (Entity.status.Value)
    {
        if (true)
        {
            await this.Queue(sessionGUID)
        }

        entity.RequestStatus = "Approve"
    }

    // Related Entities
    foreach (Entity relatedEntity in entities.Where(f => f.isMainEntity.Value != true))
    {

       //Update related Entities properties
    }

    await this.Uow.Entity.BulkInsertOrUpdate(entities);
}

Sometimes value for RequestStatus column is not getting updated in DB. But other column values gets updated everytime.

I am using EF core Bulk extension for bulk update which internally has savechanges method.

GitHub URL.