Delayed recoverability is disabled by default

[SeanFeldman]

Delayed recoverability is disabled by default

https://github.com/Particular/NServiceBus.AzureFunctions.ServiceBus/blob/8387debbf4961821f287b313341335e6ca79e4a5/src/NServiceBus.AzureFunctions.ServiceBus/Serverless/ServerlessEndpointConfiguration.cs#L23

and needs to be specified manually.

Unlike Azure Storage Queues transport, Azure Service Bus transport is capable of executing delayed recoverability natively and does not need to be disabled.

Workaround

Configure delayed recoverability manually.

endpointConfiguration.Recoverability().Delayed(c =>
    c.NumberOfRetries(numberOfDelayedRetries));