Overview: A game was duplicated at random.
I was checking one of my Daily Games. I made my move, and the computer moved me on to another game, with the exact same series of moves as the one I had just made my move on, against the same player! I knew that I hadn't played any games like that, so I reloaded the page to get rid of it. But the duplicate game was still there! Is this at all related to me being in Beta or such? I haven't tried exiting Beta to fix it because it seems so unlikely.
Environment: MacBook Pro, Mid 2012, macOS High Sierra, Google Chrome Version 66.0.3359.139 (Official Build) (64-bit).
Steps to Reproduce: Either issue a new game (1 move per 2 days) from the Game modal on the Home page or go to one of your existing Daily games. Make your move.
Warning: the bug seems to be unreproducible since it didn't happen on any of my other games, though.
Result: After moving, the game was duplicated. The duplicate game did not go away even after several moves and attempts to refresh the computer's memory.
Expected Result: The computer was simply supposed to move me on to my next game, with no duplication or such.