Issue with muting players on T6

[Scullyy]

What happened?

Some of my players reported that attempting to mute a single player would instead mute multiple people in the lobby. At first, I assumed this was intended behavior, but after creating my own player mute menu, I discovered the exact same issue. Both the stock menu and my custom menu use the TogglePlayerMute engine function, so the problem appears to originate there rather than in the menu implementation.

From my testing:

• If you mute a player who was already in the lobby when you joined (or someone who joined before you), everyone who was present at that time is muted, while players who joined later remain unaffected.

• If you mute a player who joined after you, the mute works correctly and only affects that specific player.

Expected result

It should only mute the player you intended to mute.

Steps to reproduce

1. Join a server with 2 other players.
2. Have a new match start while both players are in the server.
3. Attempt to mute one of the players and you will notice both get muted.

Affected game(s)

BO2 Multiplayer (T6MP)

Affected component(s)

Client (game)

Plutonium version

r5338

Relevant logs

N/A

Additional information

Same result with the scoreboard but this was the video I posted in contributor-lounge: https://streamable.com/50eh9a

Operating system

Windows 11

Plutonium profile

No response

Discord username

scully_