[Bug]: Unicode emojis not displaying

[kpedro88]

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

6.0.0

Operating System

Windows 11 x64

Mattermost Server Version

10.5.14

Steps to reproduce

Send a message using a Unicode emoji e.g. 🫠

Expected behavior

See the Unicode emoji displayed properly

Observed behavior

A rectangular box is displayed instead

Log Output

[2025-11-14 07:53:44.763] [info]  [UpdateManager] Downloaded version 6.0.0
[2025-11-14 07:53:49.101] [info]  [UpdateManager] Install on explicit quitAndInstall
[2025-11-14 07:53:49.101] [info]  [UpdateManager] Install: isSilent: false, isForceRunAfter: true
[2025-11-14 07:53:49.101] [info]  [UpdateManager] Executing: C:\Users\[user]\AppData\Local\mattermost-desktop-updater\pending\mattermost-desktop-setup-6.0.0-win.exe with args: --updated,--force-run
[2025-11-14 07:53:49.747] [info]  [UpdateManager] Install on explicit quitAndInstall
[2025-11-14 07:53:49.747] [warn]  [UpdateManager] install call ignored: quitAndInstallCalled is set to true
[2025-11-14 07:53:49.762] [info]  [UpdateManager] Auto install update on quit
[2025-11-14 07:53:49.762] [info]  [UpdateManager] Install: isSilent: true, isForceRunAfter: false
[2025-11-14 07:53:49.762] [info]  [UpdateManager] Executing: C:\Users\[user]\AppData\Local\mattermost-desktop-updater\pending\mattermost-desktop-setup-6.0.0-win.exe with args: --updated,/S
[2025-11-14 07:53:55.241] [error] Logger Log level set to: { level: 'info' }
[2025-11-14 07:53:55.382] [info]  [Config] Configuration updated to version 4 successfully.
[2025-11-14 07:53:55.429] [warn]  [Config] Failed to load configuration file from the filesystem. Using defaults.
[2025-11-14 07:53:55.479] [info]  [App.Config] config.autostart has been configured: { autostart: true }
[2025-11-14 07:53:55.479] [info]  [App.Config] config.autostart has been configured: { autostart: true }
[2025-11-14 07:53:55.487] [info]  [SecureStorage] Secure storage initialized - encryption available
[2025-11-14 07:53:55.495] [info]  [SecureStorage] Initialized secure storage cache
[2025-11-14 07:53:55.546] [info]  [ServerDropdownView] init
[2025-11-14 07:53:55.556] [info]  [App.Initialize] Autoupgrade disabled: true
[2025-11-14 07:53:55.635] [warn]  [i18nManager] Failed to set new language { locale: 'en-US' }
[2025-11-14 07:53:55.635] [warn]  [i18nManager] Failed to set new language { locale: 'US' }
[2025-11-14 07:53:55.715] [info]  [App.Config] config.autostart has been configured: { autostart: true }
[2025-11-14 07:53:55.755] [error] [App.Utils] clearAppCache { err: 'TypeError: Object has been destroyed' }
[2025-11-14 07:53:56.054] [info]  [ModalView] [welcomeScreen] preloading with C:\Users\[user]\AppData\Local\Programs\mattermost-desktop\resources\app.asar\internalAPI.js
[2025-11-14 07:53:56.178] [error] [WebContentsEventM...] [renderer] Uncaught (in promise) TypeError: Cannot read properties of undefined (reading 'sidebarBg')
[2025-11-14 07:54:07.833] [info]  [App.Config] config.autostart has been configured: { autostart: true }
[2025-11-16 10:29:04.382] [info]  [WebContentsEventM...] [ea14f88a-2694-491...] [402e85bf-568d-41e...] https://mattermost.web.cern.ch/
[2025-11-17 17:58:38.339] [info]  [App.Config] config.autostart has been configured: { autostart: true }

Additional Information

This only occurs on the desktop app and only after updating to 6.0.0. The web app still renders Unicode fine.

[devinbinnie]

I can't reproduce this:

Are you able to paste the emoji into the Add Server modal? If so - then it might be an issue with your server. You can also try on https://community.mattermost.com

[kpedro88]

No, I cannot paste the emoji into the Add Server modal in the desktop app (it still shows a rectangle). As noted, it works fine on the web version (with the same server).

[devinbinnie]

Thanks for trying. The only thing I can think of is that it could be a language issue - are you using the application in US English? If not try switching it over and see if that changes anything.