Don't locally echo messages with disallowed group mentions
Author: alyaCreated Jul 16, 2025Updated Sep 17, 2026
Labelsbugin progressneeds discussionarea: compose (banners & validation)has completion candidate
When you try to mention a group you aren't allowed to mention in the web app, the message incorrectly gets locally echoed.
Instead, the web app should refuse to locally echo such messages, and display the server error as a compose banner.
CZO thread: #issues > message with disallowed mention fails to send
Source: zulip/zulip