Why does the character sometimes not return a response

What do you need help with?

Bug report

Installation method

Manual installation / GitHub

Issue area

Connection / WebRTC

Impact

Major - a core flow is broken

Unreal Engine version

5.8.0

Convai Unreal Engine Plugin version

4.0.0-beta.24

Project setup

Blueprint

Target platform

Unreal Editor

Where does it happen?

Custom project

Short summary

Intermittently no response is received after sending a voice question

What happened?

After the user finishes speaking and the voice request is sent successfully, the character sometimes does not return any response. No voice playback starts, and the conversation remains stuck waiting for the character’s reply. The application itself does not crash, but the user cannot continue the normal conversation flow without retrying or restarting the interaction.

What did you expect?

After each successfully submitted voice question, the character should return a response or provide a clear error/timeout callback.

Steps to reproduce

  1. Start a conversation with the character using Push-to-Talk.
  2. Ask multiple voice questions one after another.
  3. Wait for the character’s response after each question.
  4. After approximately 50–70 interactions, one request may remain unanswered.
  5. The character does not start speaking, and the application stays in a waiting state.

Unreal logs or error messages

ConvaiSubsystemLog: :microphone: Active speaker changed: User
ConvaiSubsystemLog: :microphone: Active speaker changed: User
ConvaiSubsystemLog: Attendee ID: convai-bot, Data: {“data”:{“final”:false,“text”:" Uh,“,“timestamp”:“2026-07-13T10:09:05.844+00:00”,“user_id”:“PA_QKR8vRrENuyK”},“label”:“rtvi-ai”,“type”:“user-transcription”}
ConvaiPlayerLog: Transcription received: Uh,
ConvaiSubsystemLog: Attendee ID: convai-bot, Data: {“data”:{“final”:false,“text”:” Uh, Ed",“timestamp”:“2026-07-13T10:09:05.912+00:00”,“user_id”:“PA_QKR8vRrENuyK”},“label”:“rtvi-ai”,“type”:“user-transcription”}
ConvaiPlayerLog: Transcription received: Uh, Ed
ConvaiSubsystemLog: Attendee ID: convai-bot, Data: {“data”:{“final”:false,“text”:" Uh, Eddie,“,“timestamp”:“2026-07-13T10:09:06.045+00:00”,“user_id”:“PA_QKR8vRrENuyK”},“label”:“rtvi-ai”,“type”:“user-transcription”}
ConvaiPlayerLog: Transcription received: Uh, Eddie,
ConvaiSubsystemLog: Attendee ID: convai-bot, Data: {“data”:{“final”:false,“text”:” Uh, Eddie, tell",“timestamp”:“2026-07-13T10:09:06.330+00:00”,“user_id”:“PA_QKR8vRrENuyK”},“label”:“rtvi-ai”,“type”:“user-transcription”}
ConvaiPlayerLog: Transcription received: Uh, Eddie, tell
ConvaiSubsystemLog: Attendee ID: convai-bot, Data: {“data”:{“final”:false,“text”:" Uh, Eddie, tell me",“timestamp”:“2026-07-13T10:09:06.390+00:00”,“user_id”:“PA_QKR8vRrENuyK”},“label”:“rtvi-ai”,“type”:“user-transcription”}
ConvaiPlayerLog: Transcription received: Uh, Eddie, tell me
ConvaiSubsystemLog: :microphone: Active speaker changed: User
ConvaiSubsystemLog: Attendee ID: convai-bot, Data: {“data”:{“final”:false,“text”:" Uh, Eddie, tell me ple",“timestamp”:“2026-07-13T10:09:06.665+00:00”,“user_id”:“PA_QKR8vRrENuyK”},“label”:“rtvi-ai”,“type”:“user-transcription”}
ConvaiPlayerLog: Transcription received: Uh, Eddie, tell me ple
ConvaiSubsystemLog: Attendee ID: convai-bot, Data: {“data”:{“final”:false,“text”:" Uh, Eddie, tell me please",“timestamp”:“2026-07-13T10:09:06.805+00:00”,“user_id”:“PA_QKR8vRrENuyK”},“label”:“rtvi-ai”,“type”:“user-transcription”}
ConvaiPlayerLog: Transcription received: Uh, Eddie, tell me please
ConvaiSubsystemLog: Attendee ID: convai-bot, Data: {“data”:{“final”:false,“text”:" Uh, Eddie, tell me please about",“timestamp”:“2026-07-13T10:09:06.869+00:00”,“user_id”:“PA_QKR8vRrENuyK”},“label”:“rtvi-ai”,“type”:“user-transcription”}
ConvaiPlayerLog: Transcription received: Uh, Eddie, tell me please about
ConvaiSubsystemLog: Attendee ID: convai-bot, Data: {“data”:{“final”:false,“text”:" Uh, Eddie, tell m

I checked the relevant documentation, resources, and similar forum posts before posting.

on

I confirm that I did not include API keys, tokens, passwords, secrets, private character data, private conversation logs, or customer data.

on

Could you please share the full logs?