DataChannel stops transmitting audio after multiple manual interactions in real-time roleplay (auto turn detection disabled

[shailendra6D]

When I use manual start and stop recording with this code and set turn_detection: null, the audio stops sending after 2–3 messages. The RTCDataChannel either terminates or sometimes stays open, but no response is received. Occasionally, the issue happens even after just one message.

However, if I don’t pass turn_detection: null and also don’t manually trigger recording, everything works properly and the conversation continues without any issue

const response = await fetch("https://api.openai.com/v1/realtime/sessions", {
method: "POST",
headers: {
Authorization: Bearer ${apiKey},
"Content-Type": "application/json",
},
body: JSON.stringify({
model: "gpt-4o-realtime-preview",
voice: "alloy",
instructions: instructionData,
modalities: ["audio", "text"],
input_audio_transcription: { model: 'whisper-1', language: 'hi', },
turn_detection: null,