JIRA Deployments Integration Issues - RESOLVED

I am trying to set up TeamCity integration in to Jira Cloud and Bitbucket Cloud and I am nearly there but I have one nut I cant seem to crack...

Rather than trying to get this going with the TeamCity and Jira instances that our whole organisation uses I thought I would create a sandbox. So I have created my own Bitbucket Cloud, Jira Cloud and TeamCity (Beta) Cloud. I have set up the integration between Bitbucket and Jira no problem. I have also got most of the integration between TeamCity and Jira & Bitbucket working - important note here is that I am using the native TeamCity integration that now exists.

Branches, Commits, Pull Requests and Merges all appear correctly in Jira when I reference the Jira ID.

Builds in TeamCity also appear in the Jira development panel and when builds complete the Jira ticket is transitioned to a new column.

What I cannot get working is Jira receiving information about deployments. I have a build step in TeamCity marked as a deployment step. The build is recognised but the Deployment is not. I'm struggling to see how I can have everything configured for the builds to be seen but the deployments to not be seen.

Is there something I am missing? Has anyone got this working?

Thanks!