----------------------------- **While I generate an answer, here are some sources that might be helpful**: * [Call Ended Reason]() * [Create Assistant]() * [Update Assistant]() * [List Calls]() -----------------------------

### Answer The issue you're experiencing with some calls marked as

assistant-forwarded-call

not being forwarded might be related to several possible scenarios documented in Vapi's system behavior: 1. **Network or Configuration Issues**: If there's a network-related error or misconfiguration in your forwarding setup, the call might fail to transfer even though it's marked as forwarded. 2. **Assistant Handling Errors**: There could be errors in how the assistant handles or processes the forwarding request. This might result in the call being terminated or not forwarded correctly. 3. **Provider Specific Issues**: Depending on the third-party service (e.g., Twilio or Vonage) being used for call handling, there might be issues on their end that cause the call forwarding to fail. This could include service downtimes, API changes, or rate limiting [(1)]() . To troubleshoot these issues further, I recommend checking the following: - Ensure that the forwarding numbers are correctly formatted and viable. - Review the assistant's configuration and the logic that handles call forwarding. - Check the logs provided by your call provider for any errors or warnings that occurred during the failed call times. If the issue persists, it might be beneficial to review the detailed call logs and configurations to isolate the problem. For further investigation, you can contact the support team with the specific

call_id

and additional details about the call flow and configurations.