Access keys are not being found in branch permissions Edited

[Kristjan -]

Hi. 

I have a repo-level access key that pushes to its repo.

This repo is under the influence of project-level branch permissions.

I would like to add the access key to the exceptions in the master branch permission, but when I type the access key label (in the form of <user>@<machine_name>) all I get is "No matching users, groups, or access keys found".
Groups and users it finds, but not access keys.

Is this a bug? Currently running Bitbucket Server 6.8.0

Regards,

Kristjan