----------------------------- **While I generate an answer, here are some sources that might be helpful**: * [Prompting Guide]() * [Call Ended Reason]() * [Inbound Calling]() * [Dashboard]() -----------------------------

### Answer It sounds like the filler injection feature might still be active in your assistant's settings, even though you've intended it to be turned off. In Vapi, the customization of conversation fillers like "um" and "but" is handled by a specific model designed to make the language output sound more natural and conversational [(1)]() . To resolve this issue, please check your assistant's configuration in the Vapi dashboard to ensure the filler injection setting is turned off. If you find that the settings are as you intended and the issue persists, you may want to look into the detailed configuration of the system prompt or consider resetting the model settings temporarily to see if this resolves the anomaly. If none of these solutions work, it may be beneficial to directly inspect the configuration through the Vapi platform's settings, or potentially reach out for further support to ensure there isn't a deeper integration issue.

Got it. Tagging @User for additional help.