Repeated "Issue Ranking Operation log entry found where none expected. Please restart JIRA." when switching to "Plan" view.

After upgrading to the latest version of GH (6.0.6) we are getting "Issue Ranking Operation log entry found where none expected. Please restart JIRA." errors. After restarting Jira the error is gone. If we thereafter rank some issues to top (via the normal Jira issue edit action), switch to GH and there to "plan" view the error is triggered from time to time (non deterministic). Seems to be introduced by the upgrade to 6.0.6.

This renders the issue ranking operation useless - a real show stopper.

"Work" view is still usable.