Sorry about that @Siraj_Moideen - it was indeed a bug that will be fixed by
We have a query that list all the “users with unread” mentions or dms for chat, and, in trying to be too clever, it ended being wrong. Instead of enqueue a “chat summary” (aka. email notification) for mentions in channels or unread in dms, it was enqueueing a job for every messages Since that job ran every 5 minutes, it easily bloated sidekiq with useless jobs… (note: the email were thankfully not being sent as we would not be able to retrieve any mentions).