Review score put on wrong change in Gerrit

I was reviewing http://codereview.qt-project.org/#change,15312 using the Diff All Unified button.
After I was done, I pressed +1 and Publish Comments. I returned to change 15312, but the review was not visible.

Prior to doing this, I had just looked at, but not scored, http://codereview.qt-project.org/#change,15273. This change unfortunately did get the +1 thought I had given to 15312.

At first glance, this seems related to QTQAINFRA-411.