Voice Agent: InjectAgentMessage frequently ignored with INJECT_AGENT_MESSAGE_DURING_AGENT_SPEECH despite no audible agent/user speech

[ibrahimkholil6210]

What is the current behavior?

InjectAgentMessage is sent successfully over the Voice Agent WebSocket, but sometimes no server response event follows.
In those cases, I get none of the expected outcomes:

• no agent speech/audio
• no InjectionRefused
• no Warning
• no Error

So the inject appears to be silently ignored, even when both user and agent are silent.

———

Steps to reproduce

1. Connect to wss://agent.deepgram.com/v1/agent/converse and start a normal session.
2. Send Settings and verify conversation works.
3. Speak one user turn and wait until the agent appears done/silent.
4. Send:
   {
   "type": "InjectAgentMessage",
   "content": "Are you still on the line?"
   }
5. Observe inbound WS events for ~10–20 seconds.

I can reproduce this intermittently, especially after at least one normal turn has happened first.

———

Expected behavior

After sending InjectAgentMessage, one of these should always happen:

1. Agent starts responding (text/audio events), or
2. Server returns explicit refusal/failure (InjectionRefused, Warning, or Error).

Expected: no silent/no-op outcome.

———

Please tell us about your environment

• Operating System/Version: Windows 10
• Language: TypeScript
• Browser: Chrome

———

Other information

• I am using the newer payload shape with content (not message).
• Mic streaming remains active continuously.
• I added client-side logging for all inbound WS frames; in failure cases there are no inject-related events after send.
• This makes it hard to distinguish server busy state vs dropped/ignored inject request.

[ibrahimkholil6210]

Expected behavior clarification:

When neither the user nor the agent is speaking, sending InjectAgentMessage should reliably trigger an agent response that speaks the injected message.
If the server decides not to execute it, it should always return an explicit signal (InjectionRefused, Warning, or Error) rather than silently doing nothing.

[naomi-deepgram]

Hey @ibrahimkholil6210, please note that while InjectUserMessage expects a content property, InjectAgentMessage actually expects a message property. This is likely why you are not seeing any results.

I have escalated the silent failures to our product team, but hopefully using the correct payload unblocks you.

This may be incorrect, working with the team now.

[Moody-san]

Encountering similar issue , when can we expect this to be resolved.

[Alwyn-C-007]

same issue, whats the status here ?