Cannot get Send Async Message API to work

I created an Integration and set the routing rule as follows:

My Integration received the following values upon creation:

{
eventType: 'INTEGRATION_CREATED',
providerId: '4faa307b-8ac3-45f3-adca-dba45bf9e5cd',
integrationId: 'ee158a2d-3650-4b32-851c-eaf4f65b8f19',
integrationName: 'AndrewMessagingIntegration',
integrationType: 'custom-messaging-integrations',
accountId: 'ELSSRN'
}

I call Send Async Message and receive this:

{
messageId: '31c0937d-fe47-4a85-90eb-5e56bc1072de',
accountId: 'ELSSRN',
status: 'DELIVERED',
businessAccountName: 'ee158a2d-3650-4b32-851c-eaf4f65b8f19',
customerIdentifiers: { emailAddresses: [ '[email protected]' ] },
channelProviderId: '4faa307b-8ac3-45f3-adca-dba45bf9e5cd',
channelId: 'MESSAGING',
senderParticipantId: '12345',
senderParticipantName: 'Andrew Prokop',
senderParticipantType: 'CUSTOMER',
body: {
elementType: 'text',
elementText: { text: 'This is from Postman2', textFormat: 'PLAINTEXT' }
},
headers: { sourceType: 'custom-messaging:unknown' },
providerDialogId: '12345',
providerSenderId: '12345',
receivedAt: '2023-10-09T13:16:58.244448Z',
lastUpdatedAt: '2023-10-09T13:16:58.244443Z',
correlationId: 'd1cbb607-e09c-4dec-bb61-aa464151487d'
}

My Orchestration is not invoked and my agent never made aware of the incoming Message.

Avaya response

We've looked into this issue and for now, you need to consider the providersenderId as a required field while we are working on enhancing the experience to handle blank providersenderId scenario.