Abandoned reviews are included when applying a workflow transition for unreviewed changesets

Not sure if this should be against JIRA or Crucible, as it relates to the integration between the two:
JIRA Version: v6.2.1
JIRA Fisheye plugin: v6.2.10

I have a custom JIRA workflow which includes applying the following condition when transitioning to the Closed state:

• This transition will only execute if there are no unreviewed changesets related to this issue

If I have a changeset included in a review, but abandon that review, I can still transition the JIRA state to Closed, even though the commit shows no reviews in the Fisheye/Crucible Development tab.

Deleting the review object removes the Close button, so it seems that Abandoned reviews are counted for changesets being reviewed, but not included when displaying reviews against a changeset.

I feel like Abandoned reviews should be ignored completely with this check.