Platform, device version and operating system:
Screenshot or image:
What you were expecting to happen, and what actually happened:
This is a weird one. I sometimes get an “Unknown Error” popup at the end of Explore battles, prior to getting shown the battle rewards. Clicking “Retry” makes the popup disappear, there doesn’t seem to be any negative side effect. It happened a few times when using Auto Play, I’m not sure I’ve seen it when playing manually.
How often does this happen? When did it begin happening?
Very rarely, less than one in a hundred battles. I never saw it prior to the 6.3 update.
Steps to make it happen again
Play a lot of Explore battles. Might possibly require Auto Play to be active.