To me this sounds more like a Contribute > Feature or Contribute > UX request than Support, but I’ll leave that to the team to decide.
Some thoughts:
- Do you want the warning to disappear entirely, for all group mentions, or something else? I could see the warning removed for staff users, or an option via group settings to not warn when mentioning a specific group…
- I don’t like the idea of an auto-timeout, at least as a default setting. I can see it taking 10 seconds or more to review the similar topics listed and think about if your new topic fits, but it will disappear and no way to re-trigger it exists at the moment.