I have two different apliactions where I use service bus registration in the same way, for one it works and for the other it does not. So where is the problem?

In line with AddServiceBusClient() i am putting connectionstring form settings and i ma 100% sure that this cs exist.

        public static IServiceCollection AddProjectMessagingSubscriptions(this IServiceCollection services, IConfiguration configuration)
        {
            services.AddHostedService<HumanResourcesTopicReciever>();
            services.AddHostedService<SelfServiceTopicReciever>();

            var messagingConfiguration = configuration.GetSection("MessagingOptions");

            services.AddAzureClients(builder =>
            {
                builder.AddServiceBusClient(connectionString: messagingConfiguration["ConnectionString"]);
                builder.AddClient<ServiceBusReceiver, ServiceBusClientOptions>(
                    (_, _, provider) => provider.GetService<ServiceBusClient>()
                        .CreateReceiver(messagingConfiguration["SelfServiceTopic"], messagingConfiguration["SelfServiceTopicSubscriptionName"])).WithName("SelfServiceTopic");

                builder.AddClient<ServiceBusReceiver, ServiceBusClientOptions>(
                    (_, _, provider) => provider.GetService<ServiceBusClient>()
                         .CreateReceiver(messagingConfiguration["HumanResourcesTopic"], messagingConfiguration["HumanResourcesTopicSubscriptionName"])).WithName("HumanResourcesTopicSubscription");

            });

            return services;


        }

When I run the application I get this error

error img

It doesn’t make sense because the cs has been transferred! It looks like the library is overwriting it for me and inserting a null there, but why?

Using rider i debug servicebus library and i am sure that connectionstring is passing correctly. At some point, this value is replaced with null