Salesforce Voice: Missing Transcription After Executing the 'Update a Voice Call Record' API during an Active Call.

To fix this issue, explicitly set the "isActiveCall" parameter to "True" in the request body when executing the Update a Voice Call Record API during an active Salesforce Voice call.

When building the JSON request body for this API call, include the isActiveCall parameter and set its value to true. This signals to Salesforce Voice that the call conversation is still ongoing and prevents the system from closing the transcription session prematurely.
For example, the JSON request body should include: the isActiveCall property set to the boolean value true. Omitting this parameter — or leaving it at its default value of false — causes the transcription to stop immediately after the API call.

Note: Always verify that isActiveCall is explicitly set to true whenever you call this API mid-conversation. This is especially important in integrations that update voice call records at multiple points during a call lifecycle.