leader board spontaneously stopped working

[csterling4]

The leader board in our app has stopped working spontaneously. We used to have scores and according to the play console over 600 scores have been submitted. However when the leader board popup shows up it says there are no scores whatsoever. I've confirmed that the app actually steps through the upload scores method which uses the leader board client's submitScore method with the correct leader board id. Furthermore in the console where you can graph the history of scores its apparent that sometime in august no new scores were received. Any direction in debugging this issue would be appreciated.