[Bug]: 6.1.1: Calls disconnect after 30 seconds

[NeroBurner]

Checks before filing an issue

• This issue doesn't reproduce on web browsers (such as in Chrome). If it does, issue reports go to the Mattermost Server repository.
• I have checked the issue tracker and have not found an issue that matches the one I'm filing. This should include closed issues.
• This issue is not a troubleshooting question. Troubleshooting questions go here: https://forum.mattermost.com/c/trouble-shoot/16.
• This issue is not a feature request. You can request features and make product suggestions here: https://mattermost.com/suggestions/.
• This issue reproduces on the most recent stable version, or the most recent prerelease version of the Mattermost Desktop App.
• I have read the contribution guidelines.

Mattermost Desktop Version

6.1.1

Operating System

Ubuntu Linux 24.04 LTS x64

Mattermost Server Version

10.11.12

Steps to reproduce

• Install mattermost-desktop 6.1.1 from https://releases.mattermost.com/desktop/6.1.1/mattermost-desktop_6.1.1-1_amd64.deb
• find a nice person you want to talk to and start a call (or get called, or join a call)
• after 10 to 30 seconds you get disconnected
  • if after 30 seconds you're still in the call you're lucky and you can talk for longer (minutes without disconnect)
  • most of the times you get disconnected after 10 seconds

Expected behavior

call and stay connected

Observed behavior

disconnect in the first half minute

Doesn't happen on 6.1.0

Log Output

[2026-04-10 09:30:27.321] [error] Logger Log level set to: { level: 'info' }
[2026-04-10 09:30:27.423] [info]  [SentryHandler] Sentry initialized for error tracking { isPrerelease: false }
[2026-04-10 09:30:27.425] [warn]  [App.Initialize] Current working directory is /home/user, changing into /opt/Mattermost
[2026-04-10 09:30:27.476] [info]  [App.Config] config.autostart has been configured: { autostart: true }
[2026-04-10 09:30:27.508] [info]  [SecureStorage] Secure storage initialized - encryption available
[2026-04-10 09:30:27.515] [info]  [SecureStorage] Initialized secure storage cache
[2026-04-10 09:30:27.553] [info]  [ServerDropdownView] init
[2026-04-10 09:30:27.594] [warn]  [i18nManager] Failed to set new language { locale: 'en-US' }
[2026-04-10 09:30:27.594] [warn]  [i18nManager] Failed to set new language { locale: 'AT' }
[2026-04-10 09:30:32.584] [info]  [UpdateNotifier] Checking for updates { manually: false }
[2026-04-10 09:30:32.584] [info]  [UpdateNotifier] Fetching update info from { url: 'https://releases.mattermost.com/desktop/latest.txt' }
[2026-04-10 09:30:32.977] [info]  [UpdateNotifier] Remote version found { remoteVersion: '6.1.1', currentVersion: '6.1.1' }
[2026-04-10 09:30:32.977] [info]  [UpdateNotifier] No update available { remoteVersion: '6.1.1', currentVersion: '6.1.1' }
[2026-04-10 09:45:50.938] [info]  [BaseWindow] window closed

cmdline output has some messages, but they apper on 6.1.0 and at random times, and not at the time the disconnect happens

[346385:0410/093649.069625:ERROR:third_party/webrtc/p2p/base/port.cc:365] Port[1695e80:0:1:0:host:Net[wg0:10.11.0.x/24:Unknown:id=2]]: Received non-STUN packet from unknown address: 192.168.1.x:8443
[346439:0410/093734.381604:ERROR:third_party/webrtc/p2p/base/stun_port.cc:123] Binding request timed out from 10.11.0.x:38166 (wg0)
[346563:0410/093904.819122:ERROR:third_party/webrtc/p2p/base/stun_port.cc:123] Binding request timed out from 10.11.0.x:39602 (wg0)
[347071:0410/094352.647230:ERROR:third_party/webrtc/p2p/base/stun_port.cc:123] Binding request timed out from 10.11.0.x:41735 (wg0)

Additional Information

No response

[lieut-data]

Thanks for the report, @NeroBurner! The root cause was reported in mattermost/rtcd#189 and requires an upgrade to the Calls plugin (and rtcd, if you're using it). See our release notes:

For Calls to work properly with Desktop 6.1, one must use RTCD v1.2.5 (if using external RTCD server) or Calls plugin v1.11.1 (if using integrated RTCD).

[NeroBurner]

Thanks! I can confirm, an update of the Mattermost Call Plugin from 1.11.0 to the latest release of 1.11.5 fixes the call disconnects with Mattermost Desktop 6.1.1