We had a client reply to a ticket twice in one minute.

The ticket owner received two emails for the second message but none for the first (which was crucial content and unfortunately was therefore missed).

I'm assuming this created a race condition - the first email queued the action to send the notification, but the notification itself always includes the last message in the thread rather than the message which triggered the notification - hence the owner received two notifications for the second update and none for the first update.

Is this a known issue?  How can we mitigate it other than be wary of duplicate emails?

Thanks!