That makes sense. Thanks for the tip.
It sounds like you are creating challenges that aren't used and just naturally hitting their end time. I do this in testing all the time and some days I'll log in to find test challenges I created a week earlier have just ended as a draw. I suspect this is what you are seeing here.
While I'm testing my game across Unity and the Test Harness, games sometimes end suddenly with a ChallengeDrawnMessage. I have absolutely no code that would trigger a draw. Does anybody know what causes this?