NetworkIsPlayerTalking / MumbleIsPlayerTalking always false for the local player #4347

What happened?

NetworkIsPlayerTalking(PlayerId()) and MumbleIsPlayerTalking(PlayerId()) always return false for the local player while speaking. Any HUD voice indicator built on these natives stays off.

We first noticed it around the client update that moved to CEF 144, but I am not sure that update is the cause. Our scripts did not change in that period, and the same thing happens on our local server and on our production server (external Murmur through voice_externalAddress). A similar bug was reported for the GTAV Enhanced client in citizenfx/rfc#179 and marked fixed in the August 4 patch. This looks like a regression.

Expected result

Both natives return true while the local player is speaking, as they did before.

Reproduction steps

1. Start a client resource with:

   CreateThread(function()
       while true do
           print(("mumble=%s network=%s"):format(
               tostring(MumbleIsPlayerTalking(PlayerId())),
               tostring(NetworkIsPlayerTalking(PlayerId()))))
           Wait(500)
       end
   end)

2. Join the server with voice chat in voice-activation mode.
3. Speak continuously for a few seconds and watch the F8 console.

Importancy

Slight inconvenience

Area(s)

FiveM, Natives

Specific version(s)

Client FiveM* (b3751) [e3889] (Canary), with CEF 144 (not confirmed as the cause). Server FXServer-master v1.0.0.38220 linux, sv_enforceGameBuild 3751, Mumble voice.

Additional information

• Diagnostic over 6 s of continuous speech: 12/12 samples mumble=false network=false.
• MumbleIsConnected() returns true, and the player is in its assigned channel (MumbleGetVoiceChannelFromServerId(me) == assignedChannel).
• The client log shows the capture device being initialized:

  voip-mumble Returning device Microphone (Scarlett Solo USB) for GUID {F98B3C79-F884-4D8C-8E27-8CAA8CE8B808}
  voip-mumble MumbleAudioInput::InitializeAudioDevice: Initialized audio capture device.
  

• Resetting the "Voice chat" settings tab did not change anything.
• No script calls NetworkSetVoiceActive, MumbleSetActive or SetPlayerTalkingOverride.
• Tested alone on the local server, so I could not check whether the voice itself is still transmitted, or only the talking state is broken.