Assistant keeps stopping during mid sentence. Vapi AI #support

Assistant keeps stopping during mid sentence.

banglee_work_01007

04/09/2025, 4:21 PM

Here is an example id where the assistant just stops speaking in mid sentence, pauses, and then asks the user if they are still there. Call id: e12f6bef-9bd6-4945-93f2-efbc52a71521

Vapi Support Bot

04/09/2025, 4:24 PM

Hi there! I understand how frustrating it can be when your assistant stops mid-sentence during calls. While I can't access the specific logs for the call ID you provided (e12f6bef-9bd6-4945-93f2-efbc52a71521), I can definitely help explain some common reasons why this might be happening and suggest some troubleshooting steps. There are several potential causes for an assistant stopping mid-sentence: ### Knowledge Base Issues The assistant might stop midway while reading knowledge base files. According to [user reports](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1329700156827893821), this can happen randomly with no error messages displayed. ### Network and Connection Issues Network delays or connection problems with the transcriber can cause interruptions. As noted in [troubleshooting documentation](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1332133296347549797), checking network latency is an important step. ### Configuration Settings to Check Several configuration settings could be causing this behavior: 1. **Adjust

maxDurationSeconds

and `numWordsToInterruptAssistant`**: These settings control how long the assistant speaks and when it can be interrupted. According to [configuration guidance](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1334027136305991750), adjusting these can help. 2. **Review your

start_speaking_plan

and

transcriber

settings**: The [recommended configuration](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1338497725917827196) includes:

Copy code

json
   "start_speaking_plan": {
     "waitSeconds": 0.8,
     "smartEndpointingEnabled": true
   }

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json
   "transcriber": {
     "model": "nova-2",
     "language": "en",
     "provider": "deepgram",
     "endpointing": 300
   }

Vapi Support Bot

04/09/2025, 4:24 PM

Vapi Support Bot

04/09/2025, 4:24 PM

- [Voicemail Detection Issues](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1344633027925377064)

banglee_work_01007

04/09/2025, 4:34 PM

This is another call id: 7192e0ae-4f40-475b-bb9c-134a4c7787ed. However, from the recording there is quite a bit of background noise like the user is on a speakerphone and it doesn't seem to be ignored correctly.

banglee_work_01007

04/10/2025, 5:56 PM

Here is another call id where there is no discernible background noise but the assistant keep stopping mid sentence, Date : Apr 9, 2025, 20:52 call id: 50a450cf-b321-41a6-bc29-890cacd4523c

Kyle Brunker

04/11/2025, 2:51 PM

Hey, let me check with the team. I couldn't find the logs for these calls. Let me try to get the logs and get back to you.

banglee_work_01007

04/11/2025, 3:38 PM

The logs are in the vapi dashboard.

Kyle Brunker

04/11/2025, 10:28 PM

Yes

Kyle Brunker

04/14/2025, 12:24 AM

🔵 00:56:48:092 \[user LOG\] Model output: aol dot com to update your account 🔵 00:56:48:278 \[user LOG\] Model output: information. If you decide to cancel your pai 🔵 00:56:48:511 \[user LOG\] Model output: d subscription, please call us or visit cancel dot aol dot com 🔵 00:56:48:590 \[user LOG\] Model output: before your next billing date to avoid being charged. Do 🔵 00:56:48:596 \[user LOG\] Model output: you have any questions? 🔵 00:56:48:591 \[user LOG\] Voice input: If you decide to cancel your paid subscription, please call us or visit cancel dot aol dot com before your next billing date to avoid being charged. 🔵 00:56:48:591 ElevenLabs (Websocket #36) Pushing 148... "If you decide to cancel your paid subscription, please call us or visit cancel dot aol dot com before your next billing date to avoid being charged." 🔵 00:56:48:596 ElevenLabs (Websocket #36) Pushing 26... "Do you have any questions?" 🔵 00:56:48:597 ElevenLabs (WebSocket #36) Sending EOS Message... 🔵 00:57:14:790

assistant

Final Transcript : If you decide to cancel your paid subscription,: 0.9707031 🔵 00:57:15:903

assistant

Final Transcript : please call us.: 0.9790039

Kyle Brunker

04/14/2025, 12:26 AM

If you look at the logs, you will understand why the assistant was speaking when the VAD identified user speech is possibly starting, which might have eventually resulted in an interruption. For me to now confirm this, I require to listen to the call recording, and then I'll suggest you further endpointing solutions. As you can see in the below screenshots, on the left is that I can't access the call recording. Please share the call recording with me. https://cdn.discordapp.com/attachments/1359563980607062058/1361135559875104959/image.png?ex=67fda7c6&is=67fc5646&hm=80ff91712f96c0194fcdfd48df6f52abfa2c5c896e21604ba398d893024298e5& https://cdn.discordapp.com/attachments/1359563980607062058/1361135560227557476/image.png?ex=67fda7c6&is=67fc5646&hm=9b7fbca1ff026058608cd80275559009ce07607c2aacf669dee015e5f232b5fd&

banglee_work_01007

04/15/2025, 5:29 PM

Are there any further development on this issue? We're seeing more and more of these.

Kyle Brunker

04/17/2025, 9:12 PM

Can you share some latest call_id?

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