Discourse Zendesk

I’ve been using and really liking the Zendesk plugin. However, something unexpected just happened. When another member of the team (somebody who used to be an agent in Zendesk) replied to a thread in Discourse, Zendesk sent the message back to Discourse. So, it’s posted in the Discourse topic twice, once authored by the team member who posted it in Discourse, and again by the current assignee of the ticket in Zendesk.

Has anybody run into this and have a solution?