[AksSamples/teams-recording-bot]Server Internal Error. DiagCode: 3003#7106

The AksSamples/teams-recording-bot demo was working correctly, but now the Teams platform hangs up the call once it is answered and termination code is:
"resultInfo": {
"@odata.type": "#microsoft.graph.resultInfo",
"code": 500,
"subcode": 7106,
"message": "Server Internal Error. DiagCode: 3003#7106.@"
}.

The demo has been running through ngrok.

The Microsoft Graph SDK version is 3.8.0

Below these are the termination events:
(the user id and tenant id are changed)

EVENT 1*******************
{
"@odata.type": "#microsoft.graph.commsNotifications",
"value": [
{
"@odata.type": "#microsoft.graph.commsNotification",
"changeType": "deleted",
"resource": "/app/calls/7f1f6300-5631-4c9b-910f-40bab8c6ce8b",
"resourceUrl": "/communications/calls/7f1f6300-5631-4c9b-910f-40bab8c6ce8b",
"resourceData": {
"@odata.type": "#microsoft.graph.call",
"state": "terminated",
"resultInfo": {
"@odata.type": "#microsoft.graph.resultInfo",
"code": 500,
"subcode": 7106,
"message": "Server Internal Error. DiagCode: 3003#7106.@"
},
"terminationReason": "CallTerminated",
"direction": "incoming",
"callbackUri": "https://recording.sa.ngrok.io/0/api/calling/notification",
"source": {
"@odata.type": "#microsoft.graph.participantInfo",
"id": "c6c2fb36-d0dd-414a-b8d6-437dec272b29",
"identity": {
"@odata.type": "#microsoft.graph.identitySet",
"user": {
"@odata.type": "#microsoft.graph.identity",
"id": "XXXc1-1033-4717-8d44-11253c73XXXX",
"displayName": "Jesús Esteban Suarez",
"tenantId": "XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX",
"identityProvider": "AAD"
}
},
"endpointType": "default",
"region": "amer",
"languageId": "es-es",
"countryCode": "CO"
},
"targets": [
{
"@odata.type": "#microsoft.graph.invitationParticipantInfo",
"identity": {
"@odata.type": "#microsoft.graph.identitySet",
"applicationInstance": {
"@odata.type": "#microsoft.graph.identity",
"id": "81d14c7a-94fe-487b-abd6-9e9bc3e6603f",
"tenantId": "XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX",
"identityProvider": "AAD"
}
},
"endpointType": "default",
"id": "abdf2325-298e-403b-9085-c095e4e14134",
"region": null,
"languageId": null
}
],
"mediaConfig": {
"@odata.type": "#microsoft.graph.appHostedMediaConfig",
"blob": "{"mpUri":"net.tcp://recording.sa.ngrok.io:26421/MediaProcessor","audioRenderContexts":["d000f5fe-1949-4549-9de9-1e8bdcb99e6f"],"videoRenderContexts":[null],"audioSourceContexts":[null],"videoSourceContexts":[],"dataRenderContexts":null,"dataSourceContexts":null,"supportedAudioFormat":"Pcm16K","videoSinkEncodingFormats":["Yuv"],"mpMediaSessionId":"4a7183d9-719c-4a82-ade8-db0a2362decd","regionAffinity":null,"skypeMediaBotsVersion":"1.19.0.0025","mediaStackVersion":"2020.18.1.16","mpVersion":"7.2.0.9053","callId":"7f1f6300-5631-4c9b-910f-40bab8c6ce8b"}"
},
"meetingInfo": {
"@odata.type": "#microsoft.graph.tokenMeetingInfo",
"token": "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
},
"meetingCapability": {
"@odata.type": "#microsoft.graph.meetingCapability"
},
"tenantId": "XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX",
"myParticipantId": "abdf2325-298e-403b-9085-c095e4e14134",
"callChainId": "5e11918d-1eaf-41ef-b9b2-3a951c576f63",
"incomingContext": {
"@odata.type": "#microsoft.graph.incomingContext",
"sourceParticipantId": "c6c2fb36-d0dd-414a-b8d6-437dec272b29",
"observedParticipantId": "c6c2fb36-d0dd-414a-b8d6-437dec272b29"
},
"mediaHostedRegion": "USEA2",
"id": "7f1f6300-5631-4c9b-910f-40bab8c6ce8b",
"applicationMetadata": {
"botData": {
"callId": "5e11918d-1eaf-41ef-b9b2-3a951c576f63",
"mediaHostedRegion": "USEA2",
"user": {
"participationMethod": "Caller",
"clientLocation": "CO",
"policyHolderId": "8:orgid:XXXc1-1033-4717-8d44-11253c73XXXX",
"policyHolderTenantId": "XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX"
},
"otherSideUser": {
"id": "8:orgid:XXXX7288-8fdf-4ce5-b808-XXXXXXXXXXXX",
"participantId": "XXXa6660-7d55-4d76-979e-XXXXXXXXXXXX",
"tenantId": "XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX",
"participationMethod": "Callee"
},
"inviteReasons": [
"ComplianceRecording"
],
"policyIdentifier": "TeamsComplianceRecordingPolicy=Tenant:RecorderTeamsRecordingPolicy",
"otherRecorders": [],
"pairedRecorders": [],
"isMultiParty": true,
"applicationType": null
}
}
}
}
]
}

EVENT 2****************************
{
"@odata.type": "#microsoft.graph.commsNotifications",
"value": [
{
"@odata.type": "#microsoft.graph.commsNotification",
"changeType": "deleted",
"resource": "/app/calls/711f6300-7b5a-4b19-bd2e-b4f1ff7ac0c5",
"resourceUrl": "/communications/calls/711f6300-7b5a-4b19-bd2e-b4f1ff7ac0c5",
"resourceData": {
"@odata.type": "#microsoft.graph.call",
"state": "terminated",
"resultInfo": {
"@odata.type": "#microsoft.graph.resultInfo",
"code": 500,
"subcode": 7106,
"message": "Server Internal Error. DiagCode: 3003#7106.@"
},
"terminationReason": "CallTerminated",
"direction": "incoming",
"callbackUri": "https://recording.sa.ngrok.io/0/api/calling/notification",
"source": {
"@odata.type": "#microsoft.graph.participantInfo",
"id": "c6c2fb36-d0dd-414a-b8d6-437dec272b29",
"identity": {
"@odata.type": "#microsoft.graph.identitySet",
"user": {
"@odata.type": "#microsoft.graph.identity",
"id": "XXXc1-1033-4717-8d44-11253c73XXXX",
"displayName": "Jesús Esteban Suarez",
"tenantId": "XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX",
"identityProvider": "AAD"
}
},
"endpointType": "default",
"region": "amer",
"languageId": "es-es",
"countryCode": "CO"
},
"targets": [
{
"@odata.type": "#microsoft.graph.invitationParticipantInfo",
"identity": {
"@odata.type": "#microsoft.graph.identitySet",
"applicationInstance": {
"@odata.type": "#microsoft.graph.identity",
"id": "81d14c7a-94fe-487b-abd6-9e9bc3e6603f",
"tenantId": "XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX",
"identityProvider": "AAD"
}
},
"endpointType": "default",
"id": "51a9ff1e-3046-40f3-adaa-f97b5e73cca7",
"region": null,
"languageId": null
}
],
"mediaConfig": {
"@odata.type": "#microsoft.graph.appHostedMediaConfig",
"blob": "{"mpUri":"net.tcp://recording.sa.ngrok.io:26421/MediaProcessor","audioRenderContexts":["63cdf1da-8d5f-4337-996e-a6b8d77cd907"],"videoRenderContexts":[null],"audioSourceContexts":[null],"videoSourceContexts":[],"dataRenderContexts":null,"dataSourceContexts":null,"supportedAudioFormat":"Pcm16K","videoSinkEncodingFormats":["Yuv"],"mpMediaSessionId":"7d0bb371-1461-43c9-946d-3e6034028bf7","regionAffinity":null,"skypeMediaBotsVersion":"1.19.0.0025","mediaStackVersion":"2020.18.1.16","mpVersion":"7.2.0.9053","callId":"711f6300-7b5a-4b19-bd2e-b4f1ff7ac0c5"}"
},
"meetingInfo": {
"@odata.type": "#microsoft.graph.tokenMeetingInfo",
"token": "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
},
"meetingCapability": {
"@odata.type": "#microsoft.graph.meetingCapability"
},
"tenantId": "XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX",
"myParticipantId": "51a9ff1e-3046-40f3-adaa-f97b5e73cca7",
"callChainId": "5e11918d-1eaf-41ef-b9b2-3a951c576f63",
"incomingContext": {
"@odata.type": "#microsoft.graph.incomingContext",
"sourceParticipantId": "c6c2fb36-d0dd-414a-b8d6-437dec272b29",
"observedParticipantId": "c6c2fb36-d0dd-414a-b8d6-437dec272b29"
},
"mediaHostedRegion": "USEA",
"id": "711f6300-7b5a-4b19-bd2e-b4f1ff7ac0c5",
"applicationMetadata": {
"botData": {
"callId": "5e11918d-1eaf-41ef-b9b2-3a951c576f63",
"mediaHostedRegion": "USEA",
"user": {
"participationMethod": "Caller",
"clientLocation": "CO",
"policyHolderId": "8:orgid:XXXc1-1033-4717-8d44-11253c73XXXX",
"policyHolderTenantId": "XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX"
},
"otherSideUser": {
"id": "8:orgid:XXXX7288-8fdf-4ce5-b808-XXXXXXXXXXXX",
"participantId": "XXXa6660-7d55-4d76-979e-XXXXXXXXXXXX",
"tenantId": "XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX",
"participationMethod": "Callee"
},
"inviteReasons": [
"ComplianceRecording"
],
"policyIdentifier": "TeamsComplianceRecordingPolicy=Tenant:RecorderTeamsRecordingPolicy",
"otherRecorders": [],
"pairedRecorders": [],
"isMultiParty": true,
"applicationType": null
}
}
}
}
]
}

¿What could be happening?

No source file or test is named. Start with the AksSamples/teams-recording-bot demo, the Microsoft Graph SDK 3.8.0 setup, and the /api/calling/notification callback, then reproduce the termination events and determine whether the 500/7106 response still occurs. Done means the call no longer hangs up unexpectedly or the remaining external-service limitation is documented.