Hi Greg,
Are you still experiencing this issue? You might want to give it a try with Slack messages for Jira cloud add-on, which works functionally for my team without any duplication of notifications. Check it out here:
https://marketplace.atlassian.com/plugins/beenicon-slack-messages/cloud/overview
Cheers,
Julie
It looks like you're new here. Sign in or register to get started.